0000000001301262

AUTHOR

Carlos J. Gómez García

showing 68 related works from this author

Magnetic Properties of End-to-End Azide-Bridged Tetranuclear Mixed-Valence Cobalt(III)/Cobalt(II) Complexes with Reduced Schiff Base Blocking Ligands…

2019

Two tetranuclear mixed-valence cobalt(III/II) complexes having the general formula [(μ1,3-N3){CoII(Ln)(μ-O2CC6H4NO2)CoIII(N3)}2]PF6 (where H2L1 and H2L2 are two reduced Schiff base ligands) have been synthesized and characterized. The structures of both complexes show cobalt(II) and cobalt(III) centers with a distorted octahedral geometry with cobalt(III) and cobalt(II) centers located at the inner N2O2 and outer O4 cavities of the reduced Schiff base ligands, respectively. The oxidation states of both cobalt centers have been confirmed by bond valence sum (BVS) calculations. The magnetic properties show that both compounds behave as cobalt(II) dimers connected through an end-to-end azido b…

Chemistrychemistry.chemical_compoundCrystallographySchiff baseValence (chemistry)chemistryGeneral Chemical Engineeringchemistry.chemical_elementGeneral ChemistryAzideQD1-999CobaltArticleACS omega
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A 'Butterfly'-shaped Water Tetramer in a Cu4 Complex Supported by a Hydrazone Ligand: Synthesis, Crystal Structure, Magnetic Properties, and Quantum …

2009

A potentially tetradentate NOOO donor hydrazone ligand, LH2 (condensation product of benzhydrazide with O-vanillin) generates a tetranuclear CuII complex [Cu4(L)4]·4H2O (1), whose void spaces are occupied by water tetramers presenting a ‘butterfly’ conformation with the highest dihedral angle reported to date, as revealed by its X-ray crystal structure. 1 has also been characterized using various spectroscopic techniques, including IR, UV-vis, and elemental analysis. Variable temperature magnetic susceptibility measurements reveal the presence of moderate antiferromagnetic intra-tetramer coupling between the four CuII centres connected through simple oxo groups of the hydrazone ligand with…

CrystallographyTetramerChemistryAb initio quantum chemistry methodsSupramolecular chemistryPhysical chemistryDensity functional theoryGeneral ChemistryCrystal structureDihedral angleMagnetic susceptibilityQuantum chemistryAustralian Journal of Chemistry
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Selective Metal–Ligand Bond-Breaking Driven by Weak Intermolecular Interactions: From Metamagnetic Mn(III)-Monomer to Hexacyanoferrate(II)-Bridged Me…

2020

Metal–ligand coordination interactions are usually much stronger than weak intermolecular interactions. Nevertheless, here, we show experimental evidence and theoretical confirmation of a very rare...

010405 organic chemistryLigandIntermolecular forceHexacyanoferrate IITrimerBond breaking010402 general chemistry01 natural sciences0104 chemical sciencesInorganic ChemistryMetalchemistry.chemical_compoundCrystallographyMonomerchemistryvisual_artvisual_art.visual_art_mediumPhysical and Theoretical ChemistryInorganic Chemistry
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Growth, single crystal investigation, hirshfeld surface analysis, DFT studies, molecular docking, physico-chemical characterization and, in vitro, an…

2021

Abstract Interaction of the diphosphoric acid (H4P2O7) and organic ligand (3.4-dimethylaniline) with transition metal ions, cobalt (II) chloride leads to the formation of novel stable Co(II)-diphosphate cluster with empirical formula (C8H12N)2[Co(H2P2O7)2(H2O)2].2H2O. The structure of the synthesized material was confirmed by single crystal XRD at 120 ​K. The crystal was plate and crystallized in the triclinic P 1 ¯ space group with a ​= ​7.5340(4) A, b ​= ​7.5445(4) A, c ​= ​13.6896(8) A, α ​= ​84.215(5)°, β ​= ​76.038(5)°, γ ​= ​74.284(5)°, V ​= ​726.38(7) A3 and Z ​= ​1. Full-matrix least-squares refinement converged at R ​= ​0.035 and Rw ​= ​0.088 for 3636 independent observed reflectio…

Materials scienceIntermolecular forceContext (language use)02 engineering and technologyTriclinic crystal system010402 general chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciences0104 chemical sciencesElectronic Optical and Magnetic MaterialsInorganic ChemistryCrystalCrystallographyMaterials ChemistryCeramics and CompositesMoleculeDensity functional theoryPhysical and Theoretical Chemistry0210 nano-technologyLuminescenceSingle crystalJournal of Solid State Chemistry
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Azido and thiocyanato bridged dinuclear Ni(II) complexes involving 8-aminoquinoline based Schiff base as blocking ligands: Crystal structures, ferrom…

2020

Abstract The use of two 8-aminoquinoline-based tridentate N3-donor rigid Schiff base ligands (L1 and L2) with Ni(II) in the presence of the pseudohalides, NaN3 and NaSCN results in the crystallization of the two novel Ni(II) dimers: [Ni2(L1)2(µ1,1′-N3)2(N3)2] (1) and [Ni2(L2)2(µ1,3-NCS)2(NCS)2] (2). Both complexes are centrosymmetric Ni(II) dimers where the Schiff base ligands coordinate the octahedral Ni(II) centres in a mer configuration with one terminal and two bridging pseudohalide ligands in the remaining positions. Complex 1 shows Ni(II) ions connected by a double µ1,1′-N3− bridge whereas in complex 2 the Ni(II) ions are connected by a double µ1,3-NCS− bridge. The magnetic properties…

8-AminoquinolineSchiff baseFerromagnetic material properties010405 organic chemistryCrystal structureAzido/ThiocyanatoNi(II)Crystal structure010402 general chemistry01 natural sciences0104 chemical scienceslaw.inventionIonInorganic ChemistrySchiff baseCrystallographychemistry.chemical_compoundFerromagnetismOctahedronchemistrylawFerromagnetismMaterials ChemistryPhysical and Theoretical ChemistryCrystallizationPolyhedron
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Synthesis and characterization of a new layered organic-inorganic hybrid nickel(II) 1,4 : 5,8-naphthalenediimide bis-phosphonate, exhibiting canted a…

2008

A new Ni(II) layered hybrid organic-inorganic compound of formula Ni{sub 2}[(NDI-BP)(H{sub 2}O){sub 2}].2H{sub 2}O has been prepared in very mild conditions from N,N'-bis(2-phosphonoethyl)napthalene-1,4:5,8-tetracarboximide (NDI-BP ligand) and NiCl{sub 2}. The X-ray powder structure characterization of the title compound suggests a pillared layered organic-inorganic hybrid structure. The distance between the organic and inorganic layers has been found to be 17.8 A. The inorganic layers consist of corner sharing [NiO{sub 5}(H{sub 2}O)] octahedra and they are pillared by the diphosphonate groups. DC and AC magnetic measurements as a function of temperature and field indicate the presence of 2…

Hybrid organic-inorganic compoundChemistryNon-blocking I/Ochemistry.chemical_elementCanted antiferromagnetMagnetic measurementsCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsInorganic ChemistryMagnetizationNickelCrystallographyNuclear magnetic resonanceNi(II) naphthalendiimidephosphonateOctahedronMaterials ChemistryCeramics and CompositesAntiferromagnetismPhysical and Theoretical ChemistryHybrid materialNéel temperatureSpin canting
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Solvent-modulated structures in anilato-based 2D coordination polymers

2017

Abstract This work highlights the key role of the solvents in the structures of the series of 2D compounds [Ln2(C6O4Br2)3·(Solvent)n]·G (G = Guest). This study is based on the affinity and ability of these solvents to coordinate to lanthanides and on their possibility to act as solvation molecules. For this purpose here we focus on the Er(III) ion and on the bromanilato bridging ligand ([C6O4Br2]2− = dianion of 3,6-dibromo-2,5-dihydroxy-1,4-benzoquinone) and we play with three solvents: H2O, DMSO (dimethylsulfoxide) and DMF (dimethylformamide). Here we report the synthesis, crystal structure and magnetic characterization of compounds [Er2(C6O4Br2)3(H2O)6]·12H2O (1), [Er2(C6O4Br2)3(DMSO)4]·2…

Lanthanide010405 organic chemistryCoordination numberSolvationBridging ligandCrystal structure010402 general chemistry01 natural sciences0104 chemical sciencesInorganic ChemistrySolventchemistry.chemical_compoundCrystallographychemistryComputational chemistryMaterials ChemistryMoleculeDimethylformamidePhysical and Theoretical ChemistryPolyhedron
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Ferromagnetic copper(II)–copper(II) interaction in a single chlorido and dicyanamido bridged mixed–valence copper(I/II) 2D polymer generated by in si…

2015

A mixed-valence 2-D Cu(I/II) complex, [{Cu(II)(dmen)(μ-Cl)(μ1,5-dca)}{Cu(I)(μ1,5-dca)}]n (1) (dmen = N,N-dimethylethylenediamine, dca = dicyanamide = [N(CN)2]−), has been synthesized by in situ partial reduction of Cu(II) to Cu(I) using benzoin (2-hydroxy-1,2-di(phenyl)ethanone) as reductant. Complex 1 was characterized by spectroscopic techniques, single crystal X-ray diffraction, and low temperature magnetic measurements. Structural investigation reveals that 1 represents a mixed-valence 2-D coordination polymer formed by parallel 1-D [Cu(II)(dmen)(Cl)Cu(I)(μ1,5-dca)2]n chains running along the b axis, where chloride bridges Cu(II) ions of adjacent polymers through long connections (2.840…

Trigonal planar molecular geometryValence (chemistry)Coordination polymerInorganic chemistrychemistry.chemical_elementCopperSquare pyramidal molecular geometryMetalchemistry.chemical_compoundCrystallographychemistryBenzoinvisual_artMaterials Chemistryvisual_art.visual_art_mediumPhysical and Theoretical ChemistrySingle crystal
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Syntheses, structural characterisation and magnetic properties of Fe(ii) and Mn(ii) compounds with the pentacyanopropenido ligand; structural charact…

2006

International audience; Reactions between the metal(II) salts [M(CH3CN)n](BF4)2 (M = Fe, n = 6; M = Mn, n = 4) and some organic anionic polynitriles were studied. With the pentacyanopropenide anion pcp− [pcp− = (NC)2CC(CN)C(CN)2−], were obtained, according to the experimental conditions, the new complexes [M(pcp)2(H2O)4] (1, M = Fe; 2, M = Mn) and [M(pcp)2] (3, M = Fe; 4 = Mn). Use of the hexacyano-3,4-diazahexadienediide anion [(NC)2CC(CN)NNC(CN)C(CN)22−] instead of pcp− did not afford polynitrile metal complexes but led to a new organic derivative 5, of formula C10N8H2. Crystallographic studies indicated that the isostructural compounds 1 and 2 involve discrete monomeric units with pcp li…

DenticityStereochemistryZero field splitting[CHIM.INOR]Chemical Sciences/Inorganic chemistry010402 general chemistry01 natural sciences[ CHIM ] Chemical SciencesCatalysisMetalDelocalized electronMaterials Chemistry[CHIM]Chemical Sciences[CHIM.COOR]Chemical Sciences/Coordination chemistryIsostructuralBicyclic molecule010405 organic chemistryChemistryHydrogen bondLigand[ CHIM.COOR ] Chemical Sciences/Coordination chemistry[ CHIM.INOR ] Chemical Sciences/Inorganic chemistryGeneral Chemistry0104 chemical sciencesCrystallographyvisual_artvisual_art.visual_art_medium
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Isolation, characterization, and computational studies of the novel [Mo3(mu3-Br)2(mu-Br)3Br6]2- cluster anion.

2010

The novel trimolybdenum cluster [Mo(3)(mu(3)-Br)(2)(mu-Br)(3)Br(6)](2-) (1, {Mo(3)}(9+), 9 d-electrons) has been isolated from the reaction of [Mo(CO)(6)] with 1,2-C(2)H(4)Br(2) in refluxing PhCl. The compound has been characterized in solution by electrospray ionization mass spectrometry (ESI-MS), UV-vis spectroscopy, cyclic voltammetry, and in the solid state by X-ray analysis (counter-cations: (n-Bu)(4)N(+) (1), Et(4)N(+), Et(3)BzN(+)), electron paramagnetic resonance (EPR), magnetic susceptibility measurements, and infrared spectroscopy. The least disordered (n-Bu)(4)N(+) salt crystallizes in the monoclinic space group C2/c, a = 20.077(2) A, b = 11.8638(11) A, c = 22.521(2) A, alpha = 9…

Models MolecularSpectrometry Mass Electrospray IonizationElectrospray ionizationMolecular ConformationInfrared spectroscopychemistry.chemical_elementElectronsCrystallography X-RayVibrationlaw.inventionCoordination complexInorganic ChemistryMagneticslawCoordination ComplexesPhysical and Theoretical ChemistryElectron paramagnetic resonanceSpectroscopychemistry.chemical_classificationMolybdenumBromineChemistrySpectrum AnalysisMagnetic susceptibilityCrystallographyQuantum TheoryMonoclinic crystal systemInorganic chemistry
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Field-induced single molecule magnet behavior of a dinuclear cobalt(II) complex: a combined experimental and theoretical study.

2020

Two dinuclear cobalt(ii) complexes, [(dmso)CoIIL1(μ-(m-NO2)C6H4COO)CoII(NCS)] (1) and [(dmso)CoIIL2(μ-(m-NO2)C6H4COO)CoII(NCS)] (2) [dmso = dimethylsulfoxide, H2L1 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-methoxyphenol) and H2L2 = (2,2-dimethyl-1,3-propanediyl)bis(iminomethylene)bis(6-ethoxyphenol)] have been synthesized and structurally characterized by single-crystal X-ray diffraction, magnetic-susceptibility measurements and various spectroscopic techniques. Each complex contains a cobalt(ii) center with a slightly distorted octahedral geometry and a second cobalt(ii) center with a distorted trigonal prismatic one. To obtain insight into the physical nature of weak non-co…

Inorganic ChemistryMagnetizationCrystallographyMaterials scienceSpin stateschemistryOctahedral molecular geometrychemistry.chemical_elementSingle-molecule magnetZero field splittingTrigonal prismatic molecular geometryCobaltMagnetic susceptibilityDalton transactions (Cambridge, England : 2003)
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Slow relaxation in doped coordination polymers and dimers based on lanthanoids and anilato ligands

2019

Abstract In this work we report the synthesis, structure and magnetic properties of two lanthanoid based coordination polymers (CP) and two dimers prepared with two derivatives of the 2,5-dihydroxy-1,4-benzoquinone (C6O4X2)2− as ligands. Using the bromanilato ligand: (C6O4Br2)2− we have prepared the CP [Eu1.96Dy0.04(C6O4Br2)3(DMSO)6]·2DMSO (1) (DMSO = dimethylsulfoxide) and with the chlorocyananilato ligand: (C6O4(CN)Cl)2−) we have prepared one CP formulated as [Eu1.96Dy0.04(C6O4(CN)Cl)3(DMSO)6] (2) and two isostructural dimers: [Eu1.96Dy0.04(C6O4(CN)Cl)3(H2O)10]·6H2O (3) and [Eu2(C6O4(CN)Cl)3(H2O)10]·6H2O (4). Compounds 1, 2 and 3 are Eu(III) compounds doped with 2.0 % of Dy(III), whereas …

LanthanideSquare antiprismatic molecular geometryDenticity010405 organic chemistryChemistryLigandRelaxation (NMR)010402 general chemistry01 natural sciences0104 chemical sciencesInorganic ChemistryMetalCrystallographyvisual_artMaterials Chemistryvisual_art.visual_art_mediumMoleculePhysical and Theoretical ChemistryIsostructuralPolyhedron
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Isolation of Four New CoII/CoIII and NiII Complexes with a Pentadentate Schiff Base Ligand: Syntheses, Structural Descriptions and Magnetic Studies

2011

In this paper we report the temperature and pH dependent syntheses and systematic characterization of four new Co(II)/Co(III) and Ni(II) complexes with a pentadentate Schiff base ligand H(3)L obtained by condensing 1,3,-diaminopropan-2-ol with 2-hydroxyacetophenone in 1:2 molar ratio. The room temperature syntheses involving Co(II) and Ni(II) nitrates and the ligand H(3)L lead to the isolation of the dinuclear species [Co(2)L(2)(H(2)O)] (1), and the mononuclear complex [Ni(LH)] (3), respectively, whereas refluxing at basic pH leads to the tetranuclear complexes, [Co(II)(2)Co(III)(2)L(2)(μ(3)-OMe)(2)(NO(3))(H(2)O)(2)]NO(3)·2(H(2)O) (2), and [Ni(4)L(2)(μ(3)-OMe)(2)(H(2)O)(2)]·2H(2)O (4). 1 is…

Schiff BaseSchiff baseLigandChemistryStereochemistryCoII/CoIII ComplexPh dependentMagnetic susceptibilityNiII ComplexInorganic ChemistrySolventCrystallographychemistry.chemical_compoundFerromagnetismcrystal StructureMolar ratioCoII/CoIII Complex; NiII Complex; crystal Structure; Schiff BaseMethanol
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Key Role of the Cation in the Crystallization of Chiral Tris(Anilato)Metalate Magnetic Anions

2015

A complete study of the role played by the usually considered “innocent” cation in the synthesis of chiral tris(anilato)metalate magnetic complexes is presented. This study is based on the rational synthesis of the family of compounds formulated as A3[MIII(C6O4X2)3] with A+ = [PPh3Et]+, [PPh3Pr]+, [PBu4]+, [NHep4]+, and [PPh4]+; MIII = CrIII, FeIII, and GaIII; and [C6O4X2]2– (X = Cl, Br, and NO2; [C6O4X2]2– = dianion of the 3,6-disubstituted derivatives of 2,5-dihydroxy-1,4-benzoquinone, H4C6O4). We show and explain the unexpected key role played by the cations in isolating chiral or achiral crystals of these [MIII(C6O4X2)3]3– anions with D3 point group symmetry. Thus, among the 18 new comp…

Tris010405 organic chemistryStereochemistryChemistryGeneral Chemistry010402 general chemistryCondensed Matter Physics01 natural sciences0104 chemical scienceslaw.inventionCrystallographychemistry.chemical_compoundlawMolecular symmetryGeneral Materials ScienceCrystallizationCrystal Growth & Design
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Two stage magnetic ordering and spin idle behavior of the coordination polymer Co3(OH)2(C4O4)2·3H2O determined using neutron diffraction.

2011

We report the magnetic structure of two of the magnetically ordered phases of Co(3)(OH)(2)(C(4)O(4))(2)·3H(2)O, a coordination polymer that consists of a triangular framework decorated with anisotropic Co(II) ions. The combination of neutron diffraction experiments and magnetic susceptibility data allows us to identify one phase as displaying spin idle behavior, where only a fraction of the moments order at intermediate temperatures, while at the lowest temperatures the system orders fully. This novel magnetic behavior is discussed within the framework of a simple Hamiltonian and representational analysis and rationalizes this multiphase behavior by considering the combination of frustratio…

Inorganic ChemistryIdlechemistry.chemical_compoundCondensed matter physicsMagnetic structureChemistryCoordination polymerNeutron diffractionPhysical and Theoretical ChemistryAnisotropyInorganic chemistry
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A new Co(ii) coordination solid with mixed oxygen, carboxylate, pyridine and thiolate donors exhibiting canted antiferromagnetism with TC≈ 68 K

2006

Reaction of Co(II) chloride with the sodium salt of 2-mercaptonicotinic acid in water at 200 degrees C results in the formation of Co4(2-mna)4(H2O), which orders as a canted antiferromagnet at 68 K.

Inorganic chemistryMetals and Alloyschemistry.chemical_elementGeneral ChemistryChlorideOxygenCatalysisSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsSodium saltchemistry.chemical_compoundchemistryPyridinePolymer chemistryMaterials ChemistryCeramics and CompositesmedicineAntiferromagnetismCarboxylatemedicine.drugChemical Communications
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Synthesis and characterization of a novel dicyanamide-bridged Co(II) 1-D coordination polymer with a N 4 -donor Schiff base ligand

2017

The synthesis, structure and magnetic properties of a novel Co(II) 1D coordination polymer, [Co(L)(µ1,5-dca)(ClO4)2·MeOH]n (1) are described. Compound 1 contains two independent cationic Co(II) chains (CoA and CoB) which are parallel to the c direction and present short π-π and C-H⋯π interactions with two neighbouring chains along the b direction, giving rise to alternating layers of chains A and B in the bc plane. Variable-temperature magnetic susceptibility measurements shows a weak antiferromagnetic coupling among the adjacent cobalt(II) centres mediated through μ1,5-dca− bridge.

Schiff base010405 organic chemistryChemistryStereochemistryLigandCoordination polymerCationic polymerizationchemistry.chemical_element010402 general chemistry01 natural sciencesMagnetic susceptibilityAntiferromagnetic coupling0104 chemical sciencesInorganic ChemistryCrystallographychemistry.chemical_compoundMaterials ChemistryPhysical and Theoretical ChemistryCobaltDicyanamideInorganica Chimica Acta
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Magnetic and catalytic properties of a new copper(II)–Schiff base 2D coordination polymer formed by connected helical chains

2011

Abstract A dicyanamide bridged 2D polynuclear complex of copper(II) having molecular formula [Cu2(L)(μ1,5-dca)2]n (1) has been synthesized using the Schiff base ligand N,N′-bis(salicylidene)-1,3-diaminopentane, (H2L) and sodium dicyanamide (dca). The complex presents a 2D hexagonal structure formed by 1,5-dca singly bridged helical chains connected through double 1,5-dca bridges. The chelating characteristics of the H2L Schiff base ligand results in the formation of copper(II) dimer with a double phenoxo bridge presenting a very strong antiferromagnetic coupling in the copper(II) derivative (1) (J = −510 cm−1). The dimeric asymmetric unit of 1 is very similar to the active site of the catec…

Schiff basebiologyCoordination polymerLigandDimerchemistry.chemical_elementActive sitePhotochemistryCopperInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryMaterials Chemistrybiology.proteinPhysical and Theoretical ChemistryDicyanamideDerivative (chemistry)Inorganica Chimica Acta
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Unique direct synthesis of cyanide-bridged Fe2Cu2 molecular squares by destruction of sodium nitroprusside

2009

Abstract The one-pot reaction of copper powder, sodium nitroprusside, ammonium thiocyanate and 2,2′-bipyridine (bpy) in acetonitrile solution at ambient conditions of air and water yields the novel heterometallic [Fe2Cu2(bpy)6(μ-CN)4(NCS)2]2[Fe(CN)5(NO)](NCS)2·5H2O complex 1, which has been structurally and magnetically characterized. The most prominent feature of this complex is the unique tetranuclear Fe 2 II Cu 2 II squares comprised [Cu(bpy)NCS]+ and [Fe(bpy)2]2+ corners with CN edges. The Cu⋯Cu and Fe⋯Fe separations are ∼6.72 and ∼7.73 A, respectively. The variable-temperature magnetic susceptibility study revealed that a very weak antiferromagnetic coupling is active between Cu(II) ce…

ChemistryCyanideInorganic chemistrychemistry.chemical_elementMagnetic susceptibilityCopperAntiferromagnetic couplingInorganic Chemistrychemistry.chemical_compoundCrystallographyMaterials ChemistrymedicineAmmonium thiocyanateSodium nitroprussidePhysical and Theoretical ChemistryAcetonitrilemedicine.drugInorganic Chemistry Communications
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A family of layered chiral porous magnets exhibiting tunable ordering temperatures.

2013

A simple change of the substituents in the bridging ligand allows tuning of the ordering temperatures, Tc, in the new family of layered chiral magnets A[M(II)M(III)(X2An)3]·G (A = [(H3O)(phz)3](+) (phz = phenazine) or NBu4(+); X2An(2-) = C6O4X2(2-) = 2,5-dihydroxy-1,4-benzoquinone derivative dianion, with M(III) = Cr, Fe; M(II) = Mn, Fe, Co, etc.; X = Cl, Br, I, H; G = water or acetone). Depending on the nature of X, an increase in Tc from ca. 5.5 to 6.3, 8.2, and 11.0 K (for X = Cl, Br, I, and H, respectively) is observed in the MnCr derivative. Furthermore, the presence of the chiral cation [(H3O)(phz)3](+), formed by the association of a hydronium ion with three phenazine molecules, lead…

010405 organic chemistryHexagonal crystal systemInorganic chemistryPhenazineBridging ligand010402 general chemistry01 natural sciences3. Good health0104 chemical sciencesInorganic Chemistrychemistry.chemical_compoundCrystallographychemistryMagnetAcetone[CHIM]Chemical SciencesMoleculePhysical and Theoretical ChemistryPorosityComputingMilieux_MISCELLANEOUSDerivative (chemistry)Inorganic chemistry
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Modulation of the ordering temperature in anilato-based magnets

2019

Abstract Four new 2D honeycomb anilato-based ferrimagnets with Mn(II) and Cr(III) have been prepared and characterized. These compounds, formulated as (NBu4)[MnCr(C6O4X2)3(PhCHO)]·PhY (X/Y = Cl/H (1), Br/H (2), Cl/CHO (3) and Br/CHO (4) show that it is possible to include benzaldehyde as a co-ligand coordinated to the Mn(II) metal atom in these 2D ferrimagnets. This inclusion increases the coordination number of Mn(II) to seven resulting in a change in the ordering temperatures of these 2D ferrimagnets (from ca. 10–11 K to ca. 7 K). Here we show the role played by the additional benzaldehyde ligand and by the crystallization solvent molecules (benzene in 1 and 2 and benzaldehyde in 3 and 4)…

010405 organic chemistryLigandCoordination number010402 general chemistry01 natural sciences0104 chemical scienceslaw.inventionInorganic ChemistrySolventBenzaldehydeMetalchemistry.chemical_compoundCrystallographychemistrylawvisual_artMaterials Chemistryvisual_art.visual_art_mediumMoleculePhysical and Theoretical ChemistryCrystallizationBenzenePolyhedron
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Synthesis of isomorphous cobalt and nickel thiocyanate coordination compounds: Effect of metals on compound properties

2019

The reaction of 2-methylpiperazine with the thiocyanate ligand and two transition metals leads to the production of two new isomorphous [ML2SCN4] where L is the 2-methylpiperazine and [M =Co (1), and Ni (2)], presenting an octahedral configuration. These compounds were characterized by single crystal X-ray crystallography, TG-DTA analysis, as well as infrared and UV-Vis spectroscopy and TG-DTA. The magnetic and antibacterial properties were also determined. Through the link with N-H···S hydrogen bonds, a global 3D network was established. The studied compounds show the metal center’s impact leading to different properties. Indeed, the first compound shows high spin orbit coupling, whereas t…

magneettiset ominaisuudetchemistry.chemical_element010402 general chemistry01 natural sciencesCoordination complexInorganic ChemistryMetalchemistry.chemical_compoundTransition metalMaterials Chemistrycobalt coordination compoundkobolttiPhysical and Theoretical Chemistryantimikrobiset yhdisteetchemistry.chemical_classificationThiocyanate010405 organic chemistryHydrogen bondLigandantibacterial activitieskompleksiyhdisteetnickel coordination compound0104 chemical sciencesCrystallographychemistryvisual_artvisual_art.visual_art_mediummagnetic propertiesisomorphous structurenikkeliCobaltSingle crystalPolyhedron
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Hybrid Materials Formed by Two Molecular Networks. Towards Multiproperty Materials

1999

Abstract The possibilities offered by hybrid materials formed by two molecular networks in the context of the molecular magnets are illustrated. Molecule-based layered magnets are used as anionic hosts for electroactive molecules, with the aim of obtaining multiproperty materials exhibiting in addition to the cooperative magnetism other interesting properties according to the nature of the inserted molecules. In particular, hybrid molecular compounds containing molecular species giving rise to paramagnetic, conducting, or bi-stable properties are reported.

ChemistryMagnetismInorganic chemistryContext (language use)equipment and suppliesCondensed Matter PhysicsParamagnetismMolecular networkChemical physicsMagnetMoleculeHybrid materialhuman activitiesGroup 2 organometallic chemistry
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Improving the photocatalytic H2 evolution activity of Keggin polyoxometalates anchoring copper-azole complexes

2021

Eliminating the use of precious metals as cocatalysts and using visible light are two important aspects in the field of photocatalytic H2 evolution with polyoxometalates (POMs) as photosensitizers. Here we present two new POM-based materials: [CuII5(2-ptz)6(H2O)4(GeW12O40)]·4H2O (1) and [CuI2(ppz)4][H2GeW12O40]·8H2O (2) (2-ptz = 5-(2-pyridyl) tetrazole, ppz = 3-(pyrid-4-yl) pyrazole) synthesized with the Keggin type [GeW12O40]4− (GeW12) polyanion and copper-azole complexes. The optimum photocatalytic H2 evolution rate of compound 1 without a noble metal cocatalyst is 3813 μmol g−1 h−1, which is 7.6 times higher than that of compound 2 and more than 27 times higher than that of bare GeW12 po…

Chemistrychemistry.chemical_elementengineering.materialPyrazolePhotochemistryPollutionCopperchemistry.chemical_compoundPhotocatalysisengineeringEnvironmental ChemistryNoble metalTetrazolePhotosensitizerDispersion (chemistry)Visible spectrumGreen Chemistry
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Cu/P(4-PVP) stereochemistry in tetralin liquid-phase oxidation

2007

Abstract Cu/P(4-PVP) catalyst was used as catalyst for oxidation of tetralin in liquid phase. The catalyst was prepared by reaction of a Cu(II) salt with a 4-vinylpyridine-co-divinylbenzene polymer receptor and characterized by solid 1 H and 13 C NMR, XPS, FTIR, ESR spectroscopies, and by chemical reaction with pure tetralin. That information was used to gain insight into the stereochemistry of the active site needed to orient the reaction toward tetralone production. It was found that the Cu coordination with the pyridine was critical in influencing the peroxy-radical catalytic reaction, and that polyvinylpyridine was able to limit the autothermal oxidation. The active center is postulated…

biologyStereochemistryActive siteHeterogeneous catalysisChemical reactionCatalysisCatalysisActive centerchemistry.chemical_compoundchemistryPyridinebiology.proteinTetraloneTetralinPhysical and Theoretical ChemistryJournal of Catalysis
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Multifunctional Ni(II)-Based Metamagnetic Coordination Polymers for Electronic Device Fabrication

2020

The combination of two 8-aminoquinoline-based Schiff base ligands (L1 and L2) with SCN– and Ni(II) has led to the synthesis of two new one-dimensional thiocyanato-bridged coordination polymers: [Ni...

Inorganic Chemistrychemistry.chemical_classificationchemistry.chemical_compoundSchiff baseFabricationchemistry010405 organic chemistryPolymer chemistryPolymerPhysical and Theoretical Chemistry010402 general chemistry01 natural sciences0104 chemical sciencesInorganic Chemistry
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CCDC 1415637: Experimental Crystal Structure Determination

2015

Related Article: Samia Benmansour, Patricia Gómez-Claramunt, Cristina Vallés-García, Guillermo Mínguez Espallargas, Carlos J. Gómez García|2016|Cryst.Growth Des.|16|518|doi:10.1021/acs.cgd.5b01573

Space GroupCrystallographytris(triphenyl(propyl)phosphonium) tris(36-dichloro-45-di(oxy)-12-benzoquinonato)-galliumCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1415635: Experimental Crystal Structure Determination

2015

Related Article: Samia Benmansour, Patricia Gómez-Claramunt, Cristina Vallés-García, Guillermo Mínguez Espallargas, Carlos J. Gómez García|2016|Cryst.Growth Des.|16|518|doi:10.1021/acs.cgd.5b01573

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researchProduct

CCDC 1579865: Experimental Crystal Structure Determination

2018

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Space GroupCrystallographyCrystal SystemCrystal Structurecatena-[tris(mu-25-dibromo-36-dioxocyclohexa-14-diene-14-diolato)-hexakis(dimethyl sulfoxide)-di-lanthanum(iii) dimethyl sulfoxide solvate]Cell ParametersExperimental 3D Coordinates
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CCDC 953847: Experimental Crystal Structure Determination

2013

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-[oxonium tris(mu~2~-36-dibromo-45-dioxocyclohexa-26-diene-12-diolato)-chromium-manganese phenazine acetone solvate monohydrate]Experimental 3D Coordinates
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CCDC 1907204: Experimental Crystal Structure Determination

2019

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters(mu-3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-bis(3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-deca-aqua-di-europium(iii) (mu-3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-bis(3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-deca-aqua-dysprosium(iii)-europium(iii) hexahydrateExperimental 3D Coordinates
researchProduct

CCDC 1579871: Experimental Crystal Structure Determination

2018

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-[tris(mu-25-dibromo-36-dioxycyclohexa-25-diene-14-dione)-hexakis(dimethyl sulfoxide)-di-gadolinium(iii) dimethyl sulfoxide solvate]Experimental 3D Coordinates
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CCDC 1909315: Experimental Crystal Structure Determination

2019

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-[tetra-n-butylammonium tris(mu-25-dibromo-36-dioxocyclohexa-25-diene-14-diolato)-(benzaldehyde)-chromium(iii)-manganese(ii) benzene solvate]Experimental 3D Coordinates
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CCDC 1415636: Experimental Crystal Structure Determination

2015

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Space GroupCrystallographytris(triphenyl(propyl)phosphonium) tris(36-dichloro-45-di(oxy)-12-benzoquinonato)-iron(iii)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1579872: Experimental Crystal Structure Determination

2018

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catena-[tris(mu-25-dibromo-36-dioxycyclohexa-25-diene-14-dione)-tetrakis(dimethyl sulfoxide)-di-terbium(iii) dimethyl sulfoxide solvate dihydrate]Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1532867: Experimental Crystal Structure Determination

2017

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-[tris(mu-25-dibromo-36-dioxycyclohexa-25-diene-14-dione)-tetrakis(dimethyl sulfoxide)-di-erbium(iii) dimethyl sulfoxide solvate dihydrate]Experimental 3D Coordinates
researchProduct

CCDC 1415638: Experimental Crystal Structure Determination

2015

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Space GroupCrystallographytris(tetrabutylphosphonium) tris(45-bis(oxy)-36-dinitro-12-benzoquinonato)-chromium(iii)Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1478367: Experimental Crystal Structure Determination

2017

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catena-[(mu-dicyanoazanide)-(NN'-(22-dimethylpropane-13-diyl)bis(1-(pyridin-2-yl)methanimine))-cobalt(ii) perchlorate methanol solvate]Space GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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CCDC 1936484: Experimental Crystal Structure Determination

2020

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Space GroupCrystallographycatena-[(mu-isothiocyanato)-[1-(pyridin-2-yl)-N-(quinolin-8-yl)methanimine]-(isothiocyanato)-nickel(ii)]Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1579869: Experimental Crystal Structure Determination

2018

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-[tris(mu-25-dibromo-36-dioxocyclohexa-14-diene-14-diolato)-hexakis(dimethyl sulfoxide)-di-samarium(iii) dimethyl sulfoxide solvate]Experimental 3D Coordinates
researchProduct

CCDC 1936483: Experimental Crystal Structure Determination

2020

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Space GroupCrystallographyCrystal SystemCrystal Structurecatena-[(mu-thiocyanato)-[1-(6-methylpyridin-2-yl)-N-(quinolin-8-yl)methanimine]-(isothiocyanato)-nickel(ii)]Cell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1909314: Experimental Crystal Structure Determination

2019

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researchProduct

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2018

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Space GroupCrystallographycatena-[tris(mu-25-dibromo-36-dioxocyclohexa-14-diene-14-diolato)-hexakis(dimethyl sulfoxide)-di-praseodymium(iii) dimethyl sulfoxide solvate]Crystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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2018

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researchProduct

CCDC 1579874: Experimental Crystal Structure Determination

2018

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researchProduct

CCDC 2059295: Experimental Crystal Structure Determination

2021

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researchProduct

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2018

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researchProduct

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2017

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CCDC 953846: Experimental Crystal Structure Determination

2013

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2018

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2019

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researchProduct

CCDC 1579870: Experimental Crystal Structure Determination

2018

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2017

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CCDC 1923203: Experimental Crystal Structure Determination

2020

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researchProduct

CCDC 1994095: Experimental Crystal Structure Determination

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CCDC 1415639: Experimental Crystal Structure Determination

2015

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CCDC 1909317: Experimental Crystal Structure Determination

2019

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researchProduct

CCDC 1991670: Experimental Crystal Structure Determination

2020

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Space GroupCrystallographydiaqua-(22'-[ethane-12-diylbis(azanylylidenemethanylylidene)]bis(4-methoxyphenolato))-manganese(iii) oxonium bis(mu-cyano)-diaqua-tetracyano-bis(22'-[ethane-12-diylbis(azanylylidenemethanylylidene)]bis(4-methoxyphenolato))-iron(ii)-di-manganese(iii) tetrahydrateCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
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2019

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researchProduct

CCDC 1923202: Experimental Crystal Structure Determination

2020

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researchProduct

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2020

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bis(mu-thiocyanato)-bis[1-(pyridin-2-yl)-N-(quinolin-8-yl)ethan-1-imine]-bis(isothiocyanato)-di-nickelSpace GroupCrystallographyCrystal SystemCrystal StructureCell ParametersExperimental 3D Coordinates
researchProduct

CCDC 1415634: Experimental Crystal Structure Determination

2015

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researchProduct

CCDC 1907202: Experimental Crystal Structure Determination

2019

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researchProduct

CCDC 953848: Experimental Crystal Structure Determination

2013

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researchProduct

CCDC 1579875: Experimental Crystal Structure Determination

2018

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researchProduct

CCDC 1918387: Experimental Crystal Structure Determination

2020

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researchProduct

CCDC 953849: Experimental Crystal Structure Determination

2013

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Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameterscatena-(Tetra-n-butylammonium tris(mu~2~-25-dichloro-36-dioxy-14-benzoquinone)-di-chromium)Experimental 3D Coordinates
researchProduct

CCDC 1907205: Experimental Crystal Structure Determination

2019

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Space GroupCrystallographyCrystal SystemCrystal Structure(mu-3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-bis(3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-deca-aqua-di-europium(iii) (mu-3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-bis(3-chloro-6-cyano-45-dioxocyclohexa-26-diene-12-bis(olato))-deca-aqua-dysprosium(iii)-europium(iii) tetrahydrateCell ParametersExperimental 3D Coordinates
researchProduct