0000000001299251

AUTHOR

José Martínez-lillo

showing 114 related works from this author

Enhancement of the Intermolecular Magnetic Exchange through Halogen···Halogen interactions in Bisadeninium Rhenium(IV) Salts

2017

Two novel ReIV salts of general formula [H2ade]2[ReIVX6]X2·4H2O [H2ade2+ = 9H-adenine-1,7-diium; X = Cl(1) and Br(2)] have been synthesized and magneto-structurally characterized. 1 and 2 are isostructural salts that crystallize in the orthorhombic system with space group Fdd2. Both compounds are made up of discrete mononuclear [ReIVX6]2- and X- anions and doubly protonated adenine cations. The six-coordinate rhenium(IV) ion is bonded to six halide ligands [X = Cl (1) and Br (2)] in an octahedral geometry. Short intermolecular ReIV−X···X−ReIV interactions, as well as ReIV−X···H−N(H2ade) and ReIV−X···H−Ow hydrogen bonds, are present in the crystal lattice of 1 and 2. Magnetic suscep-tibility…

010405 organic chemistryInorganic chemistryIntermolecular forcechemistry.chemical_elementGeneral ChemistryCrystal structureRhenium010402 general chemistryCondensed Matter Physics01 natural sciencesMagnetic susceptibility0104 chemical sciencesCrystallographychemistryOctahedral molecular geometryHalogenGeneral Materials ScienceOrthorhombic crystal systemIsostructural
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Hexakis(dimethylformamide)iron(II) complex cation in hexahalorhenate(IV)-based salts: synthesis, X-ray structure and magnetic properties

2018

Two iron(II)-rhenium(IV) compounds of general formula [FeII(dmf)6][ReIVX6] [X = Cl (1) and Br (2); dmf = N,N-dimethylformamide] have been prepared and characterized. X-ray powder diffraction measurements on samples of 1 and 2 support the same structure for both systems. The crystal structure of 1 was determined by single-crystal X-ray diffraction. 1 crystallizes in the triclinic system with space group Pī. Each iron(II) is six-coordinate and bonded to six oxygens from six dmf molecules building a distorted octahedral environment. Rhenium(IV) is six-coordinate by six halide anions in an almost regular octahedral geometry. The magnetic properties were investigated from variable-temperature ma…

Crystallographychemistry.chemical_compound010405 organic chemistryChemistryX-ray crystallographyMaterials ChemistryX-rayDimethylformamidePhysical and Theoretical Chemistry010402 general chemistry01 natural sciencesPowder diffraction0104 chemical sciences
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Water Dissociation of a Dinuclear Bis(3,5‐dimethylpyrazolyl)methane Copper(II) Complex: X‐ray Diffraction Structure, Magnetic Properties, and Charact…

2018

010405 organic chemistrychemistry.chemical_element010402 general chemistry01 natural sciencesCopperDissociation (chemistry)Antiferromagnetic couplingMethane0104 chemical sciencesInorganic ChemistryCrystallographychemistry.chemical_compoundchemistryX-ray crystallographyWater splittingEuropean Journal of Inorganic Chemistry
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Halogen⋯halogen interactions in the self-assembly of one-dimensional 2,2′-bipyrimidine-based CuIIReIV systems

2018

Two one-dimensional CuIIReIV coordination polymers of the general formula {[ReIVCl4(μ-bpym)CuIIX2]·solvent}n [where bpym = 2,2′-bipyrimidine, X = Cl (1) and Br (2), and solvent = H2O (1) and CHCl3 (2)] have been prepared and characterised structurally and magnetically. Both compounds crystallise in the monoclinic system with space groups P21/c (1) and P21/n (2). Each CuII ion is bonded to two cis nitrogen atoms from the bpym ligand and to four halogen atoms. Two of these halogen atoms are placed in the equatorial plane and the other two are filling the axial positions of the CuII ion, thus generating a distorted octahedral environment for this metal ion in 1 and 2. In both compounds, the Re…

Materials science010405 organic chemistryHydrogen bondIntermolecular forceSpace groupGeneral Chemistry010402 general chemistryCondensed Matter Physics01 natural sciencesMagnetic susceptibility0104 chemical sciencesCrystallographyIntramolecular forceOctahedral molecular geometryHalogenGeneral Materials ScienceMonoclinic crystal systemCrystEngComm
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Synthesis, crystal structure and magnetic properties of an oxalato-bridged Re(IV)Mo(VI) heterobimetallic complex.

2010

The Re(IV)-Mo(VI) compound of formula (PPh(4))(2)[ReCl(4)(μ-ox)MoO(2)Cl(2)] (1) constitutes the first example of a heterodinuclear oxalato-bridged complex in the coordination chemistry of molybdenum.

Inorganic Chemistrychemistry.chemical_classificationCrystallographychemistryMolybdenumchemistry.chemical_elementCrystal structureCoordination complexDalton transactions (Cambridge, England : 2003)
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Field-induced slow magnetic relaxation and magnetocaloric effects in an oxalato-bridged gadolinium(iii)-based 2D MOF

2021

The coexistence of field-induced slow magnetic relaxation and moderately large magnetocaloric efficiency in the supra-Kelvin temperature region occurs in the 2D compound [GdIII2(ox)3(H2O)6]n·4nH2O (1), a feature that can be exploited in the proof-of-concept design of a new class of slow-relaxing magnetic materials for cryogenic magnetic refrigeration.

Inorganic ChemistryMaterials scienceCondensed matter physicschemistryField (physics)Feature (computer vision)GadoliniumMagnetic refrigerationchemistry.chemical_elementMagnetic relaxationDalton Transactions
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Ligand substitution in hexahalorhenate(IV) complexes: Synthesis, crystal structures and magnetic properties of NBu4[ReX5(DMF)] (X=Cl and Br)

2006

Abstract The preparation, crystal structures, and magnetic properties of two rhenium(IV) mononuclear compounds of formula NBu 4 [ReX 5 (DMF)] ( NBu 4 + = tetrabutylammonium cation and DMF = N , N - dimethylformamide ) with X = Cl ( 1 ) and Br ( 2 ) are reported. 1 and 2 are isostructural complexes which crystallize in the monoclinic system with the space group P 2 1 / n . The rhenium atom is six-coordinated with five X atoms and a DMF molecule forming a somewhat distorted octahedral surrounding [values of Re–X varying in the ranges 2.317(1)–2.358(1) ( 1 ) and 2.495(1)–2.518(1) A ( 2 )]. Magnetic susceptibility measurements on samples of 1 and 2 in the temperature range 1.9–300 K are interpr…

Inorganic chemistrychemistry.chemical_elementCrystal structureRheniumMagnetic susceptibilityInorganic Chemistrychemistry.chemical_compoundCrystallographyOctahedronchemistryMaterials ChemistryDimethylformamideMoleculePhysical and Theoretical ChemistryIsostructuralMonoclinic crystal systemInorganica Chimica Acta
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First Magnetostructural Study on a Heterodinuclear 2,2′-Bipyrimidine-Bridged Complex

2011

The use of the [ReCl(4)(bpym)] precursor as a ligand toward the fully solvated nickel(II) metal ion affords the first example of a 2,2'-bipyrimidine-bridged Re(IV)-Ni(II) complex, [ReCl(4)(μ-bpym)NiBr(2)(H(2)O)(2)] (1), whose intramolecular ferromagnetic coupling has been substantiated from both experimental and theoretical studies.

Inorganic ChemistryMetalCrystallographyNickelFerromagnetismStereochemistryChemistryLigandvisual_artIntramolecular forcevisual_art.visual_art_mediumchemistry.chemical_elementPhysical and Theoretical ChemistryInorganic Chemistry
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Molecular Self-Assembly in a Family of Oxo-Bridged Dinuclear Ruthenium(IV) Systems

2020

A series of six novel RuIV compounds of formula (H2bpy)2[{RuCl5}2(μ-O)] (1), (PPh4)2[{RuCl4(H2O)}2(μ-O)]·4H2O (2), (PPh4)2[{RuCl4(MeCN)}2(μ-O)] (3), (PPh4)2[{RuCl4(dmf)}2(μ-O)] (4), (PPh4)2[{RuCl4(...

Crystallography010405 organic chemistryChemistrychemistry.chemical_elementMolecular self-assemblyGeneral Materials ScienceGeneral Chemistry010402 general chemistryCondensed Matter Physics01 natural sciences0104 chemical sciencesRutheniumCrystal Growth & Design
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A heteropentanuclear oxalato-bridged [ReIV 4GdIII] complex: synthesis, crystal structure and magnetic properties

2012

The compound (NBu 4) 5[Gd III{Re IVBr 4(μ-ox)} 4(H 2O)]·H 2O (1), with intramolecular antiferromagnetic coupling, is the first Re(iv) system incorporating a 4f ion. © 2012 The Royal Society of Chemistry.

StereochemistryChemistryMetals and AlloysGeneral ChemistryCrystal structureCatalysisAntiferromagnetic couplingSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIonCrystallographyIntramolecular forceMaterials ChemistryCeramics and Composites
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Enhancing the Magnetic Coupling of Oxalato-Bridged ReIV2MII (M = Mn, Co, Ni, and Cu) Trinuclear Complexes via Peripheral Halide Ligand Effects

2011

Four heterotrinuclear Re(IV)(2)M(II) compounds of general formula (NBu(4))(2)[{Re(IV)Br(4)(μ-ox)}(2)M(II)(Him)(2)] [NBu(4)(+) = tetra-n-butylammonium cation, ox = oxalate, Him = imidazole; M = Mn (1), Co (2), Ni (3), and Cu (4)] have been synthesized by using the novel mononuclear complex [Re(IV)Br(4)(ox)](2-) as a ligand toward divalent first-row transition metal ions in the presence of imidazole. Compounds 1-4 are isostructural complexes whose structure contains discrete trinuclear [{Re(IV)Br(4)(μ-ox)}(2)M(II)(Him)(2)](2-) anions and bulky NBu(4)(+) cations. The Re and M atoms are six-coordinated: four peripheral bromo and two oxalate-oxygens (at Re), and two cis-coordinated imidazole mol…

DenticityStereochemistryLigandMagnetic susceptibilityOxalateInorganic ChemistryCrystallographychemistry.chemical_compoundOctahedronchemistryIntramolecular forceImidazolePhysical and Theoretical ChemistryIsostructuralInorganic Chemistry
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Spin state of a single-molecule magnet (SMM) creating long-range ordering on ferromagnetic layers of a magnetic tunnel junction – a Monte Carlo study

2021

Paramagnetic single-molecule magnets (SMMs) interacting with the ferromagnetic electrodes of a magnetic tunnel junction (MTJ) produce a new system. The properties and future scope of new systems differ dramatically from the properties of isolated molecules and ferromagnets. However, it is unknown how far deep in the ferromagnetic electrode the impact of the paramagnetic molecule and ferromagnet interactions can travel for various levels of molecular spin states. Our prior experimental studies showed two types of paramagnetic SMMs, the hexanuclear Mn6 and octanuclear Fe–Ni molecular complexes, covalently bonded to ferromagnets produced unprecedented strong antiferromagnetic coupling between …

Materials scienceCondensed matter physicsSpintronicsSpin statesHeisenberg modelGeneral Chemical EngineeringGeneral ChemistryCondensed Matter::Materials ScienceTunnel magnetoresistanceParamagnetismFerromagnetismMagnetCondensed Matter::Strongly Correlated ElectronsSingle-molecule magnetRSC Advances
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Hexakis(diethylacetamide)iron(II) hexahalorhenate(IV) ionic salts: X-ray structures and magnetic properties

2015

Two novel Fe<sup>II</sup>-Re<sup>IV</sup> compounds of general formula [Fe<sup>II</sup>(DEA)<inf>6</inf>][Re<sup>IV</sup>X<inf>6</inf>] where DEA = diethylacetamide and X = Cl (1) and Br (2) have been prepared and magnetostructurally characterised. Complexes 1 and 2 are isomorphic ionic salts that crystallise in the trigonal crystal system with space group R(-3). The rhenium(IV) ion in 1 and 2 is six-coordinate with six chloro (1) or bromo (2) ligands building a regular octahedral chromophore. The Fe<sup>II</sup> ion is also six-coordinate, and bonded to six oxygen atoms from six DEA molecules. [Fe<sup&gt…

/dk/atira/pure/subjectarea/asjc/1600/1606/dk/atira/pure/subjectarea/asjc/1600/1604Rhenium(IV) complexes/dk/atira/pure/subjectarea/asjc/2500/2505ChemistryInorganic chemistrySupramolecular chemistryIonic bondingchemistry.chemical_elementDiethylacetamideCrystal structureRheniumIron(II) complexesMagnetic susceptibilityX-ray diffractionInorganic ChemistryCrystallographyOctahedronMagnetic propertiesX-ray crystallographyMaterials ChemistryMoleculePhysical and Theoretical ChemistryPolyhedron
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Ferromagnetic coupling and spin canting behaviour in heterobimetallic ReIVMII/III(M = CoII/III, NiII) species

2012

Three novel heterobimetallic Re(IV) compounds of formulae [ReBr(4)(μ-ox)M(4,7-Cl(2)phen)(2)]·CH(3)CN·CH(3)NO(2) [M = Co(II) (1) and Ni(II) (2)] and [ReBr(4)(ox)](3)[Co(III)(5,6-dmphen)(3)](2)·CH(3)CN·2CH(3)NO(2)·4H(2)O (3) [ox = oxalate, 4,7-Cl(2)phen = 4,7-dichloro-1,10-phenanthroline and 5,6-dmphen = 5,6-dimethyl-1,10-phenanthroline] have been synthesised and the structures of 1 and 3 determined by single crystal X-ray diffraction. Compound 1 is an oxalato-bridged Re(IV)Co(II) heterodinuclear complex where the [ReBr(4)(ox)](2-) unit acts as a bidentate ligand towards the [Co(4,7-Cl(2)phen)(2)](2+) entity, the separation between Re(IV) and Co(II) across the oxalate being 5.482(1) Å. Compou…

Inorganic ChemistryCrystallographychemistry.chemical_compoundDenticitychemistryNitromethaneStereochemistryIonic bondingAtmospheric temperature rangeAcetonitrileSingle crystalOxalateSpin cantingDalton Trans.
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Field-induced slow relaxation of magnetisation in two one-dimensional homometallic dysprosium(iii) complexes based on alpha- and beta-amino acids.

2020

Two one-dimensional dysprosium(III) complexes based on α-glycine (gly) and β-alanine (β-ala) amino acids, with the formula {[Dy2(gly)6(H2O)4](ClO4)6·5H2O}n (1) and {[Dy2(β-ala)6(H2O)4](ClO4)6·H2O}n (2), have been synthesised and characterised structurally and magnetically. Both compounds crystallise in the triclinic system with the space group P. In 1, two DyIII ions are eight-coordinate and bound to six oxygen atoms from six gly ligands and two oxygen atoms from two water molecules, showing different geometries (bicapped trigonal prism and square antiprism). In 2, two DyIII ions are nine-coordinate and bound to seven oxygen atoms from six β-ala ligands and two oxygen atoms from two water m…

Models MolecularMolecular StructureMagnetic PhenomenaRelaxation (NMR)chemistry.chemical_elementTriclinic crystal systemCrystallography X-RayMagnetic susceptibilitySquare antiprismInorganic ChemistryCrystalCrystallographyMagnetizationchemistryCoordination ComplexesDysprosiumDysprosiumMoleculeAmino AcidsDalton transactions (Cambridge, England : 2003)
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Magneto-structural correlations in a family of ReIVCuII chains based on the hexachlororhenate(IV) metalloligand

2017

Six novel one-dimensional chloro-bridged ReIVCuII complexes of formula {[Cu(L)4][ReCl6]}n, where L = imidazole (Imi, 1), 1-methylimidazole (Meim, 2), 1-vinylimidazole (Vim, 3), 1-butylimidazole (Buim, 4), 1-vinyl-1,2,4-triazole (Vtri, 5) and N,N’-dimethylformamide (DMF, 6) are characterised structurally, magnetically and theoretically. The structures exhibit significant differences in Cu–Cl bond lengths and Re–Cl–Cu bridging angles, resulting in large differences in the nature and magnitude of magnetic exchange interactions between the ReIV and CuII ions. Theoretical calculations reveal the coupling to be primarily ferromagnetic, increasing in magnitude as the bridging angle becomes smaller…

010405 organic chemistryStereochemistry010402 general chemistry01 natural sciences0104 chemical sciencesMagnetic exchangeIonInorganic ChemistryBond lengthchemistry.chemical_compoundCrystallographychemistryFerromagnetismImidazole
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A [Cr2Ni] coordination polymer: slow relaxation of magnetization in quasi-one-dimensional ferromagnetic chains

2018

The reaction of [Cr3IIIO(OAc)6(H2O)3]NO3·AcOH with 2-hydroxynaphthaldehyde, 2-amino-isobutyric acid and NiCl2·6H2O in MeOH, under basic and solvothermal conditions, led to the formation of the quasi-1D coordination polymer {[CrIII2NiII(L)4(MeOH)2]}n (where L = the dianion of the Schiff base between 2-hydroxynaphthaldehyde and 2-amino-isobutyric acid), which behaves as a ferromagnetic chain, displaying slow relaxation of magnetization.

Materials scienceCoordination polymer010402 general chemistry01 natural sciencesCatalysisMETAL-ORGANIC FRAMEWORKSchemistry.chemical_compoundMagnetizationChain (algebraic topology)SYSTEMSNANO-MAGNETSABSORPTIONMaterials ChemistryFIELDANTIFERROMAGNETSANISOTROPYMOSSBAUER RELAXATIONSchiff base010405 organic chemistryNONLINEAR EXCITATIONSMetals and AlloysGeneral ChemistrySINGLE-MOLECULE MAGNETS0104 chemical sciencesSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsCrystallographychemistryFerromagnetismCeramics and CompositesRelaxation (physics)Quasi one dimensional
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A self-assembled tetrameric water cluster stabilized by the hexachlororhenate(IV) anion and diprotonated 2,2′-biimidazole: X-ray structure and magnet…

2008

A self-assembled tetrameric water cluster stabilized by [ReCl6]2− anions and [H4biim]2+ cations occurs in the new compound [H4biim][ReCl6]·4H2O, which exhibits a weak ferromagnetic coupling between the Re(IV) centers through an unusual ReIV–Cl⋯(H2O)⋯Cl–ReIV pathway.

CrystallographyFerromagnetismChemistryX-rayGeneral Materials ScienceGeneral ChemistryWater clusterCondensed Matter PhysicsIonSelf assembledCrystEngComm
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Pentachloro(pyrazine)rhenate(iv) complex as precursor of heterobimetallic pyrazine-containing ReIV2MII (M = Ni, Cu) species: synthesis, crystal struc…

2008

Three novel Re(IV) mononuclear complexes of formulae NBu4[ReC15(pyz)] (1), NH2Me2[ReCl5(pyz)] (2) and NH4[ReCl5(pyz)].0.75H2O (3), (pyz being pyrazine; NBu4+ = tetra-n-butylammonium cation, NH2Me2+ = dimethylammonium cation and NH4+ = ammonium cation), were synthesized by ligand substitution reaction from [ReCl6]2- anion and pyrazine in N,N-dimethylformamide (DMF). In addition, two new heterobimetallic compounds, the salt namely [ReCl5(pyz)]2[Ni(cyclam)](4) (cyclam = 1,4,8,11-tetraazacyclotetradecane) and the heterotrinuclear [{ReCl5(mu-pyz)}2Cu(DMF)4] (5) complex, were prepared by using as precursor 1 and 3, respectively. Compounds 1-5 were characterized by single-crystal X-ray diffraction…

chemistry.chemical_classificationSubstitution reactionPyrazineLigandMetal ions in aqueous solutionInorganic chemistrySalt (chemistry)Crystal structureInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryCyclamAntiferromagnetismDalton Transactions
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Highly Anisotropic Rhenium(IV) Complexes: New Examples of Mononuclear Single-Molecule Magnets

2013

The rhenium(IV) complex (NBu4)2[ReBr4(ox)] (1) (ox = oxalate and NBu4(+) = tetra-n-butylammonium cation) has been prepared and its crystal structure determined by X-ray diffraction. The structure is made up of discrete [ReBr4(ox)](2-) anions and bulky NBu4(+) cations. Each [ReBr4(ox)](2-) anion is surrounded by six NBu4(+) cations, which preclude any significant intermolecular contact between the anionic entities, the shortest rhenium···rhenium distance being 9.373(1) Å. Variable temperature dc and ac magnetic susceptibility measurements and field-dependent magnetization experiments on polycrystalline samples of 1 reveal the occurrence of highly anisotropic magnetically isolated Re(IV) cent…

010405 organic chemistryRelaxation (NMR)Inorganic chemistrychemistry.chemical_elementGeneral ChemistryCrystal structureRhenium010402 general chemistry01 natural sciencesBiochemistryMagnetic susceptibilityCatalysisOxalate3. Good health0104 chemical sciencesMagnetizationchemistry.chemical_compoundCrystallographyColloid and Surface ChemistrychemistryMolecule[PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el]IsostructuralComputingMilieux_MISCELLANEOUSJournal of the American Chemical Society
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Effect of Protonated Organic Cations and Anion−π Interactions on the Magnetic Behavior of Hexabromorhenate(IV) Salts

2015

Two novel Re-IV compounds of formula (Hbpym)(2)[(ReBr6)-Br-IV]center dot 4H(2)O (1) and (H(4)biim)[(ReBr6)-Br-IV]center dot 4H(2)O (2) [Hbpym(+) = 2,2'-bipyrimidinium cation and H(4)biim(2+) = 2,2'-biimidazolium dication] have been prepared and magnetostructurally characterized. 1 and 2 exhibit distinct crystal packing, and the presence of weak intermolecular contacts, such as Re-Br...B-rRe (1 and 2), Re-Br center dot center dot center dot(H2O)center dot center dot center dot BrRe (1 and 2), and Re-Br center dot center dot center dot pi center dot center dot center dot Br-Re (2), lead to different magnetic behaviors. While 1 is antiferromagnetic, 2 is a ferromagnetic compound and indeed the…

chemistry.chemical_classificationStereochemistryIntermolecular forceSalt (chemistry)ProtonationGeneral ChemistryCondensed Matter Physics3. Good healthDicationIonCrystalCrystallographychemistryFerromagnetismAntiferromagnetismCOMPLEXESGeneral Materials ScienceX-RAY-STRUCTURECrystal Growth & Design
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Enantiopure Conducting Salts of Dimethylbis(ethylenedithio)tetrathiafulvalene (DM‐BEDT‐TTF) with the Hexachlororhenate(IV) Anion

2014

Invited for the cover of this issue is the group of Narcis Avarvari (CIMI team) at the Laboratory MOLTECH-Anjou, UMR 6200 CNRS – Universite d'Angers, France. The cover image shows the enantiopure tetrathiafulvalene precursors used for the preparation of chiral radical cation conducting salts, together with an artwork of their packing diagrams and the suggested mirror image relationship between them.

Inorganic ChemistryCrystallographychemistry.chemical_compoundEnantiopure drugRadical ionChemistryInorganic chemistryChirality (chemistry)TetrathiafulvaleneIonEuropean Journal of Inorganic Chemistry
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Enantiopure Conducting Salts of Dimethylbis(ethylenedithio)tetrathiafulvalene (DM‐BEDT‐TTF) with the Hexachlororhenate(IV) Anion (Eur. J. Inorg. Chem…

2014

Inorganic Chemistrychemistry.chemical_compoundEnantiopure drugchemistryStereochemistryPolymer chemistrychemistry.chemical_elementRheniumChirality (chemistry)TetrathiafulvaleneIonEuropean Journal of Inorganic Chemistry
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Field-induced slow relaxation of magnetisation in an anionic heterotetranuclear [ZnIIReIV3] system

2019

The compound (NBu4)4[ZnII{ReIVCl4(μ-ox)}3] (1) [NBu4+ = tetra-n-butylammonium cation and ox2− = oxalate dianion] is the first example of an oxalato-bridged ZnII system coordinated to a 5d metal ion that exhibits slow relaxation of magnetisation.

Materials scienceCondensed matter physicsField (physics)010405 organic chemistry010402 general chemistry01 natural sciencesOxalate0104 chemical sciencesInorganic ChemistryMetalMagnetizationchemistry.chemical_compoundchemistryTheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITYvisual_artvisual_art.visual_art_mediumRelaxation (physics)Dalton Transactions
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Ligand substitution in cis-bis(acetonitrile)tetrachlororhenium(IV) complex with N,N-dimethylformamide and N,N-dimethylacetamide

2018

Abstract The preparation, crystal structures, and magnetic properties of two novel mononuclear ReIV complexes of formula cis-[ReIVCl4(dmf)2] (1) and cis-[ReIVCl4(dma)2] (2) (dmf = N,N-dimethylformamide and dma = N,N-dimethylacetamide) have been studied. Both ReIV systems were synthesized through ligand substitution reactions from the cis-[ReIVCl4(MeCN)2] precursor, upon heating in the employed solvent. 1 and 2 crystallize in the monoclinic crystal system with space group C2/c. Each ReIV ion exhibits a distorted octahedral environment, being bonded by two oxygen atoms from two dmf (1) and dma (2) molecules and four chloride ions. In the crystal lattice of 1 and 2, the mononuclear ReIV comple…

Substitution reaction010405 organic chemistryLigandCrystal structure010402 general chemistry01 natural sciencesMagnetic susceptibilityDimethylacetamide0104 chemical sciencesInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryMaterials ChemistryMoleculePhysical and Theoretical ChemistryAcetonitrileMonoclinic crystal systemPolyhedron
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Anion-Assisted Crystallization of a Novel Type of Rhenium(IV)-Based Salt

2016

A novel rhenium(IV)–manganese(II) double salt of formula (NBu4)10[{ReCl4(ox)}3Mn]2[ReCl6] (1) (NBu4+ = tetra-n-butylammonium cation and ox2– = oxalate dianion) has been prepared through the simultaneous use of two different anionic ReIV complexes, namely, [ReCl4(ox)]2– and [ReCl6]2–, in the presence of MnII ion, the [ReCl6]2– anion playing a key role in the crystallization process. 1 has been magnetically characterized and its crystal structure determined by single-crystal X-ray diffraction. The study of the magnetic properties reveals the occurrence of intramolecular antiferromagnetic exchange between ReIV and MnII ions. Remarkably, 1 is the first reported example of ReIV salt based on two…

chemistry.chemical_classification010405 organic chemistryInorganic chemistrySalt (chemistry)chemistry.chemical_elementGeneral ChemistryCrystal structureRhenium010402 general chemistryCondensed Matter Physics01 natural sciencesOxalate0104 chemical sciencesIonlaw.inventionDouble saltCrystallographychemistry.chemical_compoundchemistrylawIntramolecular forceGeneral Materials ScienceCrystallizationCrystal Growth & Design
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Detection of Hypoxanthine from Inosine and Unusual Hydrolysis of Immunosuppressive Drug Azathioprine through the Formation of a Diruthenium(III) Syst…

2021

Hypoxanthine (hpx) is an important molecule for both biochemistry research and biomedical applications. It is involved in several biological processes associated to energy and purine metabolism and has been proposed as a biomarker for a variety of disease states. Consequently, the discovery and development of systems suitable for the detection of hypoxanthine is pretty appealing in this research field. Thus, we have obtained a stable diruthenium (III) compound in its dehydrated and hydrated forms with formula [{Ru(&micro

Models MolecularPurinelcsh:BiotechnologyClinical BiochemistryMolecular Conformationchemistry.chemical_elementinosine02 engineering and technology010402 general chemistry01 natural sciencesArticleHydrolysischemistry.chemical_compoundX-Ray DiffractionLimit of Detectionlcsh:TP248.13-248.65medicineMolecule6-mercaptopurinerutheniumInosinePurine metabolismHypoxanthineazathioprineHydrolysisGeneral Medicine021001 nanoscience & nanotechnologyCombinatorial chemistry0104 chemical sciencesRutheniumchemistryPurineshypoxanthineMicroscopy Electron ScanningbiomarkerCyclic voltammetry0210 nano-technologyImmunosuppressive Agentsmedicine.drugBiosensors
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Magneto-structural correlations in dirhenium(iv) complexes possessing magnetic pathways with even or odd numbers of atoms

2017

The employment of pyrazine (pyz), pyrimidine (pym) and s-triazine (triz) ligands in ReIV chemistry leads to the isolation of a family of complexes of general formula (NBu4)2[(ReX5)2(μ-L)] (L = pyz, X = Cl (1) or Br (2); L = pym, X = Br (3); L = triz, X = Br (4)). 1-4 are dinuclear compounds where two pentahalorhenium(iv) fragments are connected by bidentate pyz, pym and triz ligands. Variable-temperature magnetic measurements, in combination with detailed theoretical studies, uncover the underlying magneto-structural correlation whereby the nature of the exchange between the metal ions is dictated by the number of intervening atoms. That is, the spin-polarization mechanism present dictates …

Magnetic measurementsDenticityPyrazinePyrimidine010405 organic chemistryChemistryStereochemistryLigandMetal ions in aqueous solution010402 general chemistry01 natural sciences0104 chemical sciencesInorganic Chemistrychemistry.chemical_compoundFerromagnetismAntiferromagnetismDalton Transactions
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Thioester-functionalised and oxime-based hexametallic manganese(iii) single-molecule magnets

2017

Two novel hexametallic MnIII complexes of formulae [Mn6(μ3-O)2(H2N-sao)6(3-atpa)2(EtOH)6]·2EtOH·2H2O (1) and [Mn6(μ3-O)2(H2N-sao)6(6-atha)2(EtOH)6]·6EtOH (2) [H2N-saoH2 = salicylamidoxime, 3-hatpa = 3-(acetylthio)propionic acid, 6-hatha = 6-(acetylthio)hexanoic acid] have been synthesised by using thioester-carboxylate ligands and magnetostructurally characterised. 1 crystallises in the triclinic system with space group P and 2 crystallises in the monoclinic system with space group P21/c. The study of the dc and ac magnetic susceptibility reveals single-molecule magnet behaviour for both compounds with spin-ground states S = 12 and S = 4 for 1 and 2, respectively. Hence, 1 and 2 are new mem…

chemistry.chemical_classificationHexanoic acidStereochemistryGeneral Chemical Engineeringchemistry.chemical_element02 engineering and technologyGeneral ChemistryManganeseTriclinic crystal system010402 general chemistry021001 nanoscience & nanotechnologyOximeThioester01 natural sciencesMagnetic susceptibility0104 chemical scienceschemistry.chemical_compoundchemistryPolymer chemistryMolecule0210 nano-technologyMonoclinic crystal systemRSC Adv.
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Exploring room-temperature transport of single-molecule magnet-based molecular spintronics devices using the magnetic tunnel junction as a device pla…

2019

A device architecture utilizing a single-molecule magnet (SMM) as a device element between two ferromagnetic electrodes may open vast opportunities to create novel molecular spintronics devices. Here, we report a method of connecting an SMM to the ferromagnetic electrodes. We utilized a nickel (Ni)–AlOx–Ni magnetic tunnel junction (MTJ) with the exposed side edges as a test bed. In the present work, we utilized an SMM with a hexanuclear [Mn6(μ3-O)2(H2N-sao)6(6-atha)2(EtOH)6] [H2N-saoH = salicylamidoxime, 6-atha = 6-acetylthiohexanoate] complex that is attached to alkane tethers terminated with thiols. These Mn-based molecules were electrochemically bonded between the two Ni electrodes of an…

Materials scienceSpintronicsbusiness.industryGeneral Chemical Engineeringchemistry.chemical_elementGeneral ChemistryNickelTunnel magnetoresistanceFerromagnetismchemistryTunnel junctionMagnetElectrodeOptoelectronicsSingle-molecule magnetbusinessRSC Advances
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A Chiral, Photoluminescent, and Spin-Canted {Cu(I)Re(IV)2}n Branched Chain.

2015

A new heteroleptic 1D Cu(I)-Re(IV) coordination polymer of the formula {Cu(I)Re(IV)Cl4(μ-Cl)(μ-pyz)[Re(IV)Cl4(μ-bpym)]}n·nMeNO2 (1; pyz = pyrazine, bpym = 2,2'-bipyrimidine) has been prepared through the Cu(I)-mediated self-assembly of two different Re(IV) metalloligands, namely, [ReCl5(pyz)](-) and [ReCl4(bpym)]. 1 consists of chiral branched chains with an overall rack-type architecture displaying photoemission and magnetic ordering. These results constitute a first step toward making new multifunctional magnetic materials based on mixed 3d-5d molecular systems.

Inorganic ChemistryCrystallographychemistry.chemical_compoundPhotoluminescencechemistryChain (algebraic topology)PyrazineCoordination polymerStereochemistryPhysical and Theoretical ChemistryMolecular systemsSpin (physics)Inorganic chemistry
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Hexabromorhenate(IV) salt of a trans-dioxorhenium(V) cation: X-ray structure and magnetic properties

2014

Abstract A novel rhenium(IV)–rhenium(V) compound of formula NBu4[ReVO2(py)4][ReIVBr6] (1) (NBu4+ = tetra-n-butylammonium cation and py = pyridine) has been prepared and characterized. The crystal structure of 1 was determined by single crystal X-ray diffraction. 1 crystallizes in the monoclinic system with space group Cc. The rhenium(IV) ion is six-coordinate by six Br atoms [average value of the ReIV–Br bonds lengths being ca. 2.509(1) A], while rhenium(V) ion is six-coordinate by two axial oxo groups and four N atoms from four pyridine ligands [average values of the ReV O and ReV–N bonds lengths being ca. 1.77 and ca. 2.14 A, respectively]. The magnetic properties were investigated from s…

Inorganic chemistryX-raychemistry.chemical_elementCrystal structureRheniumIonInorganic ChemistryCrystallographychemistryMaterials ChemistryCrystallitePhysical and Theoretical ChemistrySpin (physics)Single crystalMonoclinic crystal systemPolyhedron
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Magneto-structural study on a series of rhenium(IV) complexes containing biimH2, pyim and bipy ligands

2008

Abstract Three rhenium(IV) mononuclear compounds of formulae [ReCl4(biimH2)] · 2DMF (1), [ReCl4(pyim)] · DMF (2) and [ReCl4(bipy)] (3) (biimH2 = 2,2′-biimidazole, pyim = 2-(2′-pyridyl)imidazole, bipy = 2,2′-bipyridine and DMF = N,N-dimethylformamide) have been prepared and characterized. The crystal structure of 2 was determined by single crystal X-ray diffraction. Compound 2 crystallizes in the monoclinic system with P21/c as space group. The rhenium atom is six-coordinated by four Cl atoms and two nitrogen atoms from a bidentate pyim ligand [average values of Re–Cl and Re–N bonds lengths being 2.330(2) and 2.117(4) A, respectively]. The magnetic properties were investigated from susceptib…

Denticitychemistry.chemical_elementCrystal structureRhenium22'-BipyridineInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryMaterials ChemistryImidazoleAntiferromagnetismPhysical and Theoretical ChemistrySingle crystalMonoclinic crystal systemPolyhedron
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Aquapentachlororhenate(iv): a singular and promising building block for metal assembly

2015

The novel ReIV compound of formula PPh4[ReIVCl5(H2O)] (1) is the first example of a ReIV compound containing a coordinated water molecule which has been magnetostructurally studied.

MetalChemistryStereochemistryTheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITYGeneral Chemical EngineeringBlock (telecommunications)visual_artvisual_art.visual_art_mediumMoleculeGeneral ChemistryCombinatorial chemistryRSC Advances
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A Gadolinium(III) Complex Based on the Thymine Nucleobase with Properties Suitable for Magnetic Resonance Imaging

2021

The paramagnetic gadolinium(III) ion is used as contrast agent in magnetic resonance (MR) imaging to improve the lesion detection and characterization. It generates a signal by changing the relaxivity of protons from associated water molecules and creates a clearer physical distinction between the molecule and the surrounding tissues. New gadolinium-based contrast agents displaying larger relaxivity values and specifically targeted might provide higher resolution and better functional images. We have synthesized the gadolinium(III) complex of formula [Gd(thy)2(H2O)6](ClO4)3·2H2O (1) [thy = 5-methyl-1H-pyrimidine-2,4-dione or thymine], which is the first reported compound based on gadolinium…

crystal structureMaterials scienceMagnetometerQH301-705.5GadoliniumContrast Mediachemistry.chemical_elementmetal complexesCrystallography X-Ray010402 general chemistry01 natural sciencesArticleCatalysisIonNucleobaselaw.inventionInorganic Chemistrymagnetic resonanceMagneticsParamagnetismchemistry.chemical_compoundNuclear magnetic resonanceHeterocyclic CompoundslawthyminemedicineMoleculePhysical and Theoretical ChemistryBiology (General)Molecular BiologyQD1-999SpectroscopyMolecular Structuremedicine.diagnostic_test010405 organic chemistryOrganic ChemistryWaterMagnetic resonance imagingGeneral Medicinecontrast agentMagnetic Resonance Imaging0104 chemical sciencesComputer Science ApplicationsThymineChemistrychemistryrelaxivityProtonsgadolinium
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Synthesis, Crystal Structure, Magnetic Properties, and Theoretical Studies of [{Cu(mepirizole)Br}2(μ-OH)(μ-pz)] (Mepirizole = 4-Methoxy-2-(5-methoxy-…

2003

A novel mu-pyrazolato-mu-hydroxo-dibridged copper(II) complex has been synthesized and structurally characterized: [(Cu(mepirizole)Br)2(mu-OH)(mu-pz)] (mepirizole=4-methoxy-2-(5-methoxy-3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine; pz=pyrazolate). The title compound crystallizes in the monoclinic system, space group P2(1)/c, with a=15.618(2) A, b=15.369(3) A, c=16.071(3) A, and beta=112.250(1) degrees. The structure is built up of dinuclear [(Cu(mepirizole)Br)2(mu-OH)(mu-pz)] units with five-coordinated copper(II) ions (CuBrN3O chromophores) linked by mu2-OH and mu2-pyrazolato bridges that are well separated from each others. The intramolecular copper-copper distance is 3.378(3) A. Magnetic…

Models MolecularChemical PhenomenaChemistry PhysicalBand gapStereochemistryIronchemistry.chemical_elementCrystal structureChromophoreCrystallography X-RayLigandsCopperMagnetic susceptibilityIonInorganic ChemistryMagneticsCrystallographychemistryIntramolecular forceIndicators and ReagentsEpirizolePhysical and Theoretical ChemistryMonoclinic crystal systemInorganic Chemistry
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Self-Assembly of the Hexabromorhenate(IV) Anion with Protonated Benzotriazoles: X-ray Structure and Magnetic Properties

2014

Two novel ReIV compounds of formulas [HBTA]2[ReIVBr6] (1) and [HMEBTA]2[ReIVBr6] (2) [BTA = 1H-benzotriazole and MEBTA = 1-(methoxymethyl)-1H-benzotriazole] have been synthesized and magneto-structurally characterized. 1 and 2 crystallize in the triclinic system with space group P1̅. In both compounds, the rhenium ion is six-coordinate, bonded to six bromo ligands in a regular octahedral geometry. Short ReIV–Br···Br–ReIV contacts, π–π stacking, and H-bonding interactions occur in the crystal lattice of both 1 and 2, generating novel supramolecular structures based on the ReIV. The different dispositions of the cations and the intermolecular Br···Br contacts in 1 and 2 play an important stru…

ChemistryStereochemistryIntermolecular forceStackingSupramolecular chemistryProtonationGeneral ChemistryCrystal structureTriclinic crystal systemCondensed Matter PhysicsMagnetic susceptibility3. Good healthCrystallographyOctahedral molecular geometryGeneral Materials Science
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Coexistence of metamagnetism and slow relaxation of magnetization in ammonium hexafluoridorhenate.

2020

The (NH4)2[ReF6] (1) salt was studied by X-ray diffraction, Raman spectroscopy, theoretical calculations, and magnetic measurements. 1 crystallizes in the trigonal space group Pm1 (Re–F = 1.958(5) A). In the Raman spectrum of 1, splitting of the observed peaks was observed and correlated to the valence frequencies of vibration of the [ReF6]2− anion. The study of the magnetic properties of 1, through DC and AC magnetic susceptibility measurements, reveals the coexistence of metamagnetism and slow relaxation of magnetization at low temperature, which is unusual in the molecular systems based on the paramagnetic 5d metal ions reported so far.

Valence (chemistry)Materials scienceCondensed matter physicsGeneral Chemical EngineeringRelaxation (NMR)General ChemistryMagnetic susceptibilityIonMagnetizationParamagnetismsymbols.namesakesymbolsCondensed Matter::Strongly Correlated ElectronsRaman spectroscopyMetamagnetismRSC advances
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Molecular magnetism, quo vadis? A historical perspective from a coordination chemist viewpoint☆

2017

Abstract Molecular magnetism has travelled a long way from the pioneering studies on electron exchange and double exchange or spin crossover and valence tautomerism in small oligonuclear complexes, from mono- to di- and tetranuclear species, to the current investigations about magnetic anisotropy and spin dynamics or quantum coherence of simple mono- or large polynuclear complexes, behaving as switchable bistable molecular nanomagnets for potential applications in information data storage and processing. In this review, we focus on the origin and development of the research in the field of molecular magnetism from a coordination chemistry viewpoint, which dates back to the establishment of …

chemistry.chemical_classificationValence (chemistry)Spintronics010405 organic chemistryMagnetismNanotechnology010402 general chemistry01 natural sciences0104 chemical sciencesCoordination complexInorganic ChemistrychemistrySpin crossoverMagnetochemistryMaterials ChemistryPhysical and Theoretical ChemistryQuantumQuantum computerCoordination Chemistry Reviews
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Cubane-Type CuII4 and MnII2MnIII2 Complexes Based on Pyridoxine: A Versatile Ligand for Metal Assembling

2013

By using Vitamin B6 in its monodeprotonated pyridoxine form (PN-H) [PN = 3-hydroxy-4,5-bis(hydroxymethyl)-2-methylpyridine], two tetranuclear compounds of formula [Mn4(PN-H)4(CH3CO2)3Cl2]Cl·2CH3OH·2H2O (1) and [Cu4(PN-H)4Cl2(H2O)2]Cl2 (2) have been synthesized and magneto-structurally characterized. 1 crystallizes in the triclinic system with space group P1 whereas 2 crystallizes in the orthorhombic system with Fdd2 as space group. They exhibit Mn(II)2Mn(III)2 (1) and Cu(II)4 (2) cubane cores containing four monodeprotonated pyridoxine groups simultaneously acting as chelating and bridging ligands (1 and 2), three bridging acetate ligands in the syn-syn conformation (1), and two terminally …

Models MolecularManganeseMolecular StructureStereochemistryLigandPyridoxineTriclinic crystal systemLigandsMagnetic susceptibilitySquare pyramidal molecular geometryInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryOctahedronCubaneOrganometallic CompoundsHydroxymethylOrthorhombic crystal systemPhysical and Theoretical ChemistryCopperInorganic Chemistry
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Ferromagnetic exchange interaction in a new Ir(iv)-Cu(ii) chain based on the hexachloroiridate(iv) anion.

2019

The iridium(IV) complex (NBu4)2[IrCl6] (1) has been synthetised, characterised and used as a precursor to prepare the new chloro-bridged heterobimetallic IrIV–CuII chain of formula {IrCl5(μ-Cl)Cu(viim)4}n (2) [viim = 1-vinylimidazole]. The crystal structure and magnetic properties of 1 and 2 have been investigated. Both compounds crystallise in the monoclinic system with space group C2/c. Each IrIV ion in both 1 and 2 is six-coordinate and bonded to six chloride ions in a regular octahedral geometry. In compound 2, the CuII ion exhibits an axially elongated octahedron with four N atoms, from four monodentate viim ligands, that form the equatorial plane, and two chloride ions that occupy the…

Materials scienceDenticity010405 organic chemistryCrystal structure010402 general chemistry01 natural sciencesMagnetic susceptibility0104 chemical sciencesInorganic ChemistryCrystalCrystallographyMagnetizationFerromagnetismOctahedral molecular geometryMonoclinic crystal systemDalton transactions (Cambridge, England : 2003)
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Self-Assembled One- and Two-Dimensional Networks Based on NH2Me2[ReX5(DMF)] (X = Cl and Br) Species: Polymorphism and Supramolecular Isomerism in Re(…

2011

Three mononuclear rhenium(IV) compounds of general formula NH 2 Me 2 [ReX 5 (DMF)] [NH 2 Me 2 + = dimethylammonium cation, DMF = N,N-dimethylformamide, and X = Cl (1 and 2) and Br (3)] have been prepared and characterized. In all three cases, the rhenium atom is six-coordinated by five chloro (1 and 2) or bromo (3) atoms and one oxygen atom from a DMF molecule (1―3) building a somewhat distorted octahedral surrounding. Short Re IV ―X · · · X―Re IV contacts and H-bonds occur in the crystal lattice generating novel supramolecular Re(IV) architectures. 1 and 2 are polymorphs and supramolecular isomers that exhibit supramolecular ladder-like ( 1 ) and rectangular two-dimensional grids (2), the …

StereochemistrySupramolecular chemistrychemistry.chemical_elementGeneral ChemistryCrystal structureRheniumCondensed Matter PhysicsMagnetic susceptibilitylaw.inventionCrystallographychemistryOctahedronlawMoleculeAntiferromagnetismGeneral Materials ScienceCrystallizationCrystal Growth & Design
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Synthesis and characterisation of a novel ferrimagnetic chain based on copper(II) and rhenium(IV)

2019

Abstract A novel one-dimensional copper(II)–rhenium(IV) coordination polymer of formula {[ReIVBr4(μ-ox)CuII(pyim)2]·MeCN}n (1) [ox = oxalate anion, pyim = 2-(2′-pyridyl)imidazole] has been prepared and characterised. Powder X-ray diffraction measurements on a sample of 1 support the purity of the bulk sample, whereas single-crystal X-ray diffraction shows that 1 crystallises in the orthorhombic system with space group Pbca. The crystal structure of 1 is made up of [CuII(pyim)2]2+ cations and [ReBr4(ox)]2− anions linked through bridging bromide and oxalate groups, which generate alternating CuII and ReIV chains. Variable-temperature magnetic susceptibility measurements performed on 1 reveal …

Materials science010405 organic chemistryCoordination polymerGeneral Chemical Engineeringchemistry.chemical_elementGeneral ChemistryCrystal structureRhenium010402 general chemistry01 natural sciencesMagnetic susceptibilityOxalate0104 chemical sciencesCrystallographychemistry.chemical_compoundchemistryFerrimagnetismImidazoleOrthorhombic crystal systemComptes Rendus Chimie
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X-Ray structure of [ReCl4(μ-ox)Cu(pyim)2]: a new heterobimetallic ReIVCuIIferrimagnetic chain

2008

A new heterobimetallic Re(IV)Cu(II) compound has been prepared and its crystal structure determined by single-crystal X-ray diffraction; magnetic susceptibility measurements show that this compound behaves as a ferrimagnetic chain with significant antiferromagnetic interactions between Re(IV) and Cu(II) metal ions.

Inorganic ChemistryDiffractionCrystallographyMaterials scienceChain (algebraic topology)FerrimagnetismMetal ions in aqueous solutionX-rayAntiferromagnetismCrystal structureMagnetic susceptibilityDalton Trans.
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Self-assembly of the tetrachlorido(oxalato)rhenate( iv ) anion with protonated organic cations: X-ray structures and magnetic properties

2016

Two novel ReIV compounds of formulae [H2bpy][ReIVCl4(ox)] (1) and [H3biim]2[ReIVCl4(ox)] (2) [H2bpy2+ = 4,4′-bipyridinium dication, H3biim+ = 2,2′-biimidazolium monocation, and ox2− = oxalate dianion] have been synthesised and magneto-structurally characterised. 1 crystallises in the monoclinic system with space group C2/c, and 2 crystallises in the triclinic system with space group P[1 with combining macron]. The ReIV ion in 1 and 2 is six-coordinate, bonded to four chloride ions and two oxalate-oxygen atoms in a distorted octahedral geometry. Short intermolecular ReIV–Cl⋯Cl–ReIV contacts, Cl⋯π type interactions and hydrogen bonds are present in the crystal lattice of both compounds, gener…

010405 organic chemistryChemistryInorganic chemistrySupramolecular chemistryGeneral ChemistryCrystal structureTriclinic crystal system010402 general chemistryCondensed Matter Physics01 natural sciencesMagnetic susceptibilityOxalate0104 chemical sciencesDicationchemistry.chemical_compoundCrystallographyOctahedral molecular geometryGeneral Materials ScienceMonoclinic crystal system
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Metamagnetic behaviour in a new Cu(ii)Re(iv) chain based on the hexachlororhenate(iv) anion

2014

A new chloro-bridged heterobimetallic Cu(ii)Re(iv) chain of formula {Cu(pyim)(Him)2ReCl6}n·MeCN (·MeCN) has been prepared and magnetostructurally characterised. Compound is the first example of the [Re(IV)Cl6](2-) anion acting as a metalloligand towards a paramagnetic metal ion.

ChemistryStereochemistryMetals and AlloysGeneral ChemistryCatalysisSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIonMetalCrystallographyParamagnetismChain (algebraic topology)visual_artMaterials ChemistryCeramics and Compositesvisual_art.visual_art_mediumChemical Communications
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Spin canting in Re(IV) complexes: magnetic properties of [ReX4(bpym)] ( X = Cl and Br; bpym = 2,2′-bipyrimidine)

2008

The mononuclear complexes [ReCl4(bpym)] (1) and [ReBr4(bpym)] (2) (bpym = 2,2′-bipyrimidine) are weak ferromagnets. Magnetic ordering occurs below 7.0 (1) and 20.0 K (2) and good hysteresis loops are observed for the two compounds at 2.0 K. A spin-canting phenomenon, i.e., a non-strict linearity of the individual spins aligned in an anti-parallel way by intermolecular antiferromagnetic coupling occurring in many Re(IV) complexes, accounts for these magnetic features which are unusual in molecular solids such as 1 and 2.

HysteresisMolecular solidFerromagnetismCondensed matter physicsSpinsChemistryIntermolecular forceMaterials ChemistryPhysical and Theoretical ChemistryAntiferromagnetic couplingSpin cantingJournal of Coordination Chemistry
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Rhenium(IV) cyanate complexes: Synthesis, crystal structures and magnetic properties of NBu4[ReBr4(OCN)(DMF)] and (NBu4)2[ReBr(OCN)2(NCO)3]

2006

Abstract Two new rhenium(IV) mononuclear compounds of formula NBu4[ReBr4(OCN)(DMF)] (1) and (NBu4)2[ReBr(OCN)2(NCO)3] (2) (NBu4 = tetrabutylammonium cation, OCN = O-bonded cyanate anion, NCO = N-bonded cyanate anion and DMF = N,N-dimethylformamide) have been synthesized and their crystal structures determined by single-crystal X-ray diffraction. 1 crystallizes in the monoclinic system with the space group P21/n, whereas 2 crystallizes in the triclinic one with P 1 ¯ as space group. In both complexes the rhenium atom is six-coordinated, in 1 by four Br atoms in the equatorial plane, and two trans-oxygen atoms, one of a DMF molecule and another one from a cyanato group, while in 2 by one brom…

ChemistryInorganic chemistrychemistry.chemical_elementCrystal structureTriclinic crystal systemRheniumCyanateMagnetic susceptibilityInorganic ChemistryCrystallographychemistry.chemical_compoundOctahedronMaterials ChemistryMoleculePhysical and Theoretical ChemistryMonoclinic crystal systemInorganica Chimica Acta
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Hexahalorhenate(iv) salts of protonated ciprofloxacin: antibiotic-based single-ion magnets

2021

Two novel Re(IV) compounds of formula [H2cip][Hcip][ReCl6]Cl·H2O (1) and [Hcip]2[ReBr6] (2) [(H2cip)2+/(Hcip)+ = ciprofloxacindiium cation / ciprofloxacinium cation] have been synthesized and studied structurally and magnetically. 1 crystallizes in the monoclinic system with space group P21/c, whereas 2 crystallizes in the orthorhombic system with space group Pbca. 1 and 2 are hexahalorhenate(IV) salts obtained with the protonated ciprofloxacin antibiotic. In their crystal lattice, the [ReX6]2− [X = Cl(1) and Br(2)] anions are well separated from each other through the protonated ciprofloxacindiium (1) and ciprofloxacinium (1 and 2) cations, which are arranged without generating intermolecu…

MagnetizationCrystallographyParamagnetismHydrogen bondChemistryGeneral Materials ScienceProtonationOrthorhombic crystal systemGeneral ChemistryCrystal structureCondensed Matter PhysicsMagnetic susceptibilityMonoclinic crystal systemCrystEngComm
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Towards multifunctional magnetic systems through molecular-programmed self assembly of Re(IV) metalloligands

2015

Abstract The molecular-programmed approach based on the use as ligands of tailor-made metalloligands containing stable six-coordinate rhenium(IV) as paramagnetic centres is presented in this review article. A relatively large amount of spin density is covalent-delocalized away from the rhenium to the peripheral atoms of the ligands in the case of the Re(IV) metalloligands, as shown by polarized neutron diffraction experiments and density functional theory calculations. This feature accounts for the significant through space-magnetic interactions that occur in most of its mononuclear species and more interestingly it also explains the strengthening of the magnetic interactions in the heterom…

ChemistryStereochemistryPolyatomic ionchemistry.chemical_elementBridging ligandRheniumInorganic Chemistrychemistry.chemical_compoundParamagnetismCrystallographyCyclamMaterials ChemistryMoleculeDensity functional theorySelf-assemblyPhysical and Theoretical ChemistryCoordination Chemistry Reviews
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Hexachlororhenate(IV) salts of ruthenium(III) cations: X-ray structure and magnetic properties

2012

Abstract Two novel rhenium(IV)–ruthenium(III) compounds of formulae [RuCl(NH3)5]2[ReCl6]Cl2 (1) and [RuCl2(en)2]2[ReCl6]·2CH3CN (2) (en = 1,2-ethylenediamine) have been prepared and characterized. Their crystal structures were determined by single-crystal X-ray diffraction. 1 crystallizes in the monoclinic system with C2/m as space group, whereas 2 crystallizes in the triclinic system with space group P(−1). The crystal structures of 1 and 2 are made up of discrete [ReCl6]2− anions and [RuCl(NH3)5]2+ (1) or [RuCl2(en)2]+ (2) cations held together by N–H···Cl hydrogen bonds, van der Waals and electrostatic forces. The magnetic properties were investigated from susceptibility measurements per…

Hydrogen bondInorganic chemistrychemistry.chemical_elementCrystal structureRheniumTriclinic crystal systemRutheniumInorganic Chemistrysymbols.namesakeCrystallographychemistryMaterials ChemistrysymbolsPhysical and Theoretical Chemistryvan der Waals forceSpin cantingMonoclinic crystal systemInorganica Chimica Acta
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Hexanuclear manganese(III) single-molecule magnets based on oxime and azole-type ligands

2019

Abstract Two novel hexanuclear manganese(III) complexes belonging to the Mn6 family of single-molecule magnets (SMMs), of formulae [Mn6(μ3-O)2(H2N-sao)6(bta)2(EtOH)6]·2EtOH·4H2O (1) and [Mn6(μ3-O)2(H2N-sao)6(pta)2(EtOH)6]·4EtOH (2) [H2N-saoH2 = salicylamidoxime, bta = 1,2,3-benzotriazolate anion, pta = 5-phenyl-tetrazolate anion], have been synthesized and characterized structurally and magnetically. Both compounds crystallize in the triclinic system with space group P 1 ¯ (1 and 2). In their crystal packing, adjacent Mn6 complexes are connected through non-coordinating solvent molecules, which are H-bonded to N atoms of azole rings and –NH2 groups of salicylamidoxime ligand. The study of t…

010405 organic chemistryLigandMetal ions in aqueous solutionRelaxation (NMR)chemistry.chemical_elementManganeseTriclinic crystal system010402 general chemistry01 natural sciencesMagnetic susceptibility0104 chemical sciencesInorganic ChemistryCrystallographyMagnetizationchemistryMaterials ChemistryMoleculePhysical and Theoretical ChemistryPolyhedron
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A novel series of rhenium-bipyrimidine complexes: synthesis, crystal structure and electrochemical properties

2007

Four novel rhenium complexes of formula [ReCl(4)(bpym)] (1), [ReBr(4)(bpym)] (2) PPh(4)[ReCl(4)(bpym)] (3) and NBu(4)[ReBr(4)(bpym)] (4) (bpym = 2,2'-bipyrimidine, PPh(4) = tetraphenylphosphonium cation and NBu(4) = tetrabutylammonium cation), have been synthesized and their crystal structures determined by single-crystal X-ray diffraction. The structures of 1 and 2 consist of [ReX(4)(bpym)] molecules held together by van der Waals forces. In both complexes the Re(iv) central atom is surrounded by four halide anions and two nitrogen atoms of a bpym bidentate ligand in a distorted octahedral environment. The structures of 3 and 4 consist of [ReX(4)(bpym)](-) anions and PPh(4)(+) () or NBu(4)…

Coordination sphereLigandInorganic chemistrychemistry.chemical_elementCrystal structureRheniumInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryOctahedronOxidation stateMoleculeAcetonitrileDalton Trans.
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Holmium(III) Single-Ion Magnet for Cryomagnetic Refrigeration Based on an MRI Contrast Agent Derivative

2021

The coexistence of field-induced blockage of the magnetization and significant magnetocaloric effects in the low-temperature region occurs in a mononuclear holmium(III) diethylenetriamine-N,N,N′,N″,N″-pentaacetate complex, whose gadolinium(III) analogue is a commercial MRI contrast agent. Both properties make it a suitable candidate for cryogenic magnetic refrigeration, thus enlarging the variety of applications of this simple class of multifunctional molecular nanomagnets.

MRI contrast agentGadoliniumCommunicationMagnetic PhenomenaRefrigerationchemistry.chemical_elementPentetic AcidInorganic ChemistryCold TemperatureMagnetizationchemistry.chemical_compoundHolmiumNuclear magnetic resonancechemistryCoordination ComplexesRefrigerationMagnetMagnetic refrigerationMagnetsPhysical and Theoretical ChemistryHolmiumDerivative (chemistry)Inorganic Chemistry
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Pressure induced enhancement of the magnetic ordering temperature in rhenium(IV) monomers

2016

Materials that demonstrate long-range magnetic order are synonymous with information storage and the electronics industry, with the phenomenon commonly associated with metals, metal alloys or metal oxides and sulfides. A lesser known family of magnetically ordered complexes are the monometallic compounds of highly anisotropic d-block transition metals; the ‘transformation' from isolated zero-dimensional molecule to ordered, spin-canted, three-dimensional lattice being the result of through-space interactions arising from the combination of large magnetic anisotropy and spin-delocalization from metal to ligand which induces important intermolecular contacts. Here we report the effect of pres…

ScienceQCondensed Matter::Strongly Correlated ElectronsQDequipment and suppliesArticle
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CCDC 1029762: Experimental Crystal Structure Determination

2015

Related Article: José Martínez-Lillo, Joan Cano, Wolfgang Wernsdorfer, Euan K. Brechin|2015|Chem.-Eur.J.|21|8790|doi:10.1002/chem.201500439

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametershexakis(mu-2-(N'-oxidocarbamimidoyl)phenolato)-bis(mu-oxido)-diaqua-hexakis(pyridine)-hexa-manganese hexachloro-rhenium benzene acetonitrile solvate tetrahydrateExperimental 3D Coordinates
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CCDC 983736: Experimental Crystal Structure Determination

2014

Related Article: Flavia Pop, Magali Allain, Pascale Auban-Senzier, José Martínez-Lillo, Francesc Lloret, Miguel Julve, Enric Canadell, Narcis Avarvari|2014|Eur.J.Inorg.Chem.||3855|doi:10.1002/ejic.201400125

Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinatesbis((SS)-2-(56-dihydro[13]dithiolo[45-b][14]dithiin-2-ylidene)-56-dimethyl-56-dihydro[13]dithiolo[45-b][14]dithiin-4-ium) bis((SS)-2-(56-dihydro[13]dithiolo[45-b][14]dithiin-2-ylidene)-56-dimethyl-56-dihydro[13]dithiolo[45-b][14]dithiine) hexachloro-rhenium(iv) NN-dimethylformamide solvate
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CCDC 1568973: Experimental Crystal Structure Determination

2017

Related Article: Carlos Rojas-Dotti, José Martínez-Lillo|2017|RSC Advances|7|48841|doi:10.1039/C7RA09841C

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parametershexakis(mu-2-(N'-oxidocarbamimidoyl)phenolato)-bis(mu-oxo)-bis(3-(acetylsulfanyl)hexanoato)-hexakis(ethanol)-hexa-manganese(iii) ethanol solvateExperimental 3D Coordinates
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CCDC 1048365: Experimental Crystal Structure Determination

2015

Related Article: José Martínez-Lillo , Anders H. Pedersen , Juan Faus , Miguel Julve , and Euan K. Brechin|2015|Cryst.Growth Des.|15|2598|doi:10.1021/acs.cgd.5b00436

bis(2-(pyrimidin-2-yl)pyrimidin-1-ium) hexabromo-rhenium tetrahydrateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1048366: Experimental Crystal Structure Determination

2015

Related Article: José Martínez-Lillo , Anders H. Pedersen , Juan Faus , Miguel Julve , and Euan K. Brechin|2015|Cryst.Growth Des.|15|2598|doi:10.1021/acs.cgd.5b00436

Space GroupCrystallographyCrystal SystemCrystal Structure3H3'H-22'-biimidazol-1-ium hexabromo-rhenium tetrahydrateCell ParametersExperimental 3D Coordinates
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CCDC 1568972: Experimental Crystal Structure Determination

2017

Related Article: Carlos Rojas-Dotti, José Martínez-Lillo|2017|RSC Advances|7|48841|doi:10.1039/C7RA09841C

Space GroupCrystallographyhexakis(mu-2-(N'-oxidocarbamimidoyl)phenolato)-bis(mu-oxo)-bis(3-(acetylsulfanyl)propanoato)-hexakis(ethanol)-hexa-manganese(iii) ethanol solvate dihydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1848843: Experimental Crystal Structure Determination

2018

Related Article: Donatella Armentano, Adrián Sanchis-Perucho, Carlos Rojas-Dotti, José Martínez-Lillo|2018|CrystEngComm|20|4575|doi:10.1039/C8CE00996A

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-(bis(mu-chloro)-(mu-22'-bipyrimidine)-tetrachloro-copper-rhenium hemihydrate)Experimental 3D Coordinates
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CCDC 1991872: Experimental Crystal Structure Determination

2020

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-(hexakis(mu-glycine)-tetra-aqua-di-dysprosium hexaperchlorate pentahydrate)Experimental 3D Coordinates
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CCDC 1848844: Experimental Crystal Structure Determination

2018

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catena-(bis(mu-bromo)-(mu-22'-bipyrimidine)-tetrachloro-copper-rhenium chloroform solvate)Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1557653: Experimental Crystal Structure Determination

2017

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CCDC 1586972: Experimental Crystal Structure Determination

2018

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CCDC 1534670: Experimental Crystal Structure Determination

2017

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CCDC 1550275: Experimental Crystal Structure Determination

2017

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Space GroupCrystallographyCrystal Systemcatena-(bis(mu-chloro)-tetrachloro-tetrakis(1-ethenyl-1H-imidazole)-copper-rhenium)Crystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1580082: Experimental Crystal Structure Determination

2018

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CCDC 2046049: Experimental Crystal Structure Determination

2021

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CCDC 1550272: Experimental Crystal Structure Determination

2017

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Space GroupCrystallographyCrystal SystemCrystal Structurecatena-(bis(mu-chloro)-tetrachloro-tetrakis(1-ethenyl-1H-124-triazole)-copper-rhenium)Cell ParametersExperimental 3D Coordinates
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CCDC 1922348: Experimental Crystal Structure Determination

2019

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CCDC 1550271: Experimental Crystal Structure Determination

2017

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CCDC 1534665: Experimental Crystal Structure Determination

2017

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CCDC 1503662: Experimental Crystal Structure Determination

2016

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Space GroupCrystallographyCrystal System44'-bipyridin-1-ium tetrachloro-(oxalato)-rheniumCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1049976: Experimental Crystal Structure Determination

2015

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2019

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CCDC 1054691: Experimental Crystal Structure Determination

2015

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CCDC 1534671: Experimental Crystal Structure Determination

2017

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Space GroupCrystallographybis(44-dimethyl-22-bis(pyridin-2-yl)-13-oxazolidine N-oxyl radical)-cobalt(ii) hexabromo-rhenium(iv)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CSD 1962857: Experimental Crystal Structure Determination

2021

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Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1866320: Experimental Crystal Structure Determination

2018

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CCDC 1534674: Experimental Crystal Structure Determination

2017

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CCDC 1556333: Experimental Crystal Structure Determination

2017

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CCDC 1534667: Experimental Crystal Structure Determination

2017

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2017

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2017

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CCDC 1910060: Experimental Crystal Structure Determination

2019

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researchProduct

CCDC 1534669: Experimental Crystal Structure Determination

2017

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CCDC 1018429: Experimental Crystal Structure Determination

2015

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2017

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researchProduct

CCDC 1029763: Experimental Crystal Structure Determination

2015

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researchProduct

CCDC 1556332: Experimental Crystal Structure Determination

2017

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CCDC 986670: Experimental Crystal Structure Determination

2014

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researchProduct

CCDC 1503663: Experimental Crystal Structure Determination

2016

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2015

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2015

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2020

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researchProduct

CCDC 1586971: Experimental Crystal Structure Determination

2018

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researchProduct

CCDC 1447970: Experimental Crystal Structure Determination

2016

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CCDC 1922347: Experimental Crystal Structure Determination

2019

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CCDC 983737: Experimental Crystal Structure Determination

2014

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bis((RR)-2-(56-dihydro[13]dithiolo[45-b][14]dithiin-2-ylidene)-56-dimethyl-56-dihydro[13]dithiolo[45-b][14]dithiin-4-ium) bis((RR)-2-(56-dihydro[13]dithiolo[45-b][14]dithiin-2-ylidene)-56-dimethyl-56-dihydro[13]dithiolo[45-b][14]dithiine) hexachloro-rhenium(iv) NN-dimethylformamide solvateSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1534673: Experimental Crystal Structure Determination

2017

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2017

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CCDC 1550273: Experimental Crystal Structure Determination

2017

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CCDC 2046050: Experimental Crystal Structure Determination

2021

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CCDC 1534672: Experimental Crystal Structure Determination

2017

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researchProduct

CCDC 1534668: Experimental Crystal Structure Determination

2017

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researchProduct

CCDC 1557650: Experimental Crystal Structure Determination

2017

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CCDC 2047766: Experimental Crystal Structure Determination

2021

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researchProduct

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2017

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CCDC 1011546: Experimental Crystal Structure Determination

2015

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researchProduct

CCDC 1910059: Experimental Crystal Structure Determination

2019

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researchProduct

CCDC 854108: Experimental Crystal Structure Determination

2014

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researchProduct

CCDC 1550276: Experimental Crystal Structure Determination

2017

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