0000000001308014
AUTHOR
Livia Arizaga
Pentachloro(pyrazine)rhenate(iv) complex as precursor of heterobimetallic pyrazine-containing ReIV2MII (M = Ni, Cu) species: synthesis, crystal structures and magnetic properties
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…
Synthesis, crystal structure, electrochemical and magnetic properties of (NBu4)[ReCl5(L)] with L=pyrimidine and pyridazine
Abstract Two novel rhenium(IV) compounds, namely (NBu4)[ReCl5(pym)] (1) and (NBu4)[ReCl5(pyd)] (2) (pym = pyrimidine, pyd = pyridazine and NBu4 = n-tetrabutylammonium cation), have been obtained by reaction of [ReCl6]2− and the diazine in dmf, and their crystal structures determined by single-crystal X-ray diffraction. The structures of 1 and 2 consist of [ReCl5(pym)]− or [ReCl5(pyd)]− anions and NBu 4 + cations held together by electrostatic forces and van der Waals interactions. Stacking interactions are present only in 1. The coordination sphere of the ReIV ion is defined by five chloride anions and one nitrogen atom of a monodentate diazine, resulting in a distorted octahedral environme…
Synthesis, characterization and magnetic properties of mixed-valence iron complexes with 2-pyridyl oximes
Two new mixed-valence iron complexes with 2-pyridyl oximes, [Fe(mpko)3Fe(H2O)2(NO3)](NO3)·2H2O (1) (mpko− = methyl(2-pyridyl)ketone oximate) and [{Fe(dpko)3}2Fe](ClO4)·4H2O (2) (dpko− = bis(2-pyridyl)ketone oximate), have been prepared by reaction of FeIII with mpkoH in methanol (1) and FeII with dpkoH in methanol/water (2). Dinuclear FeII(low-spin)FeIII(high-spin) and trinuclear FeII(low-spin)FeIII(high-spin)FeII(low-spin) cations are present in the crystal structure of 1 and 2, respectively. Intermolecular hydrogen bonds in 1 lead to weak antiferromagnetic interactions between pairs of neighboring FeIII centers, which allows observation of single-ion zero-field splitting effects.
Synthesis, Crystal Structure and Magnetic Properties of Heteropolynuclear Re IV M II Complexes Based on the Robust [ReCl 5 (pyzCOO)] 2– Unit (pyzCOO = 2‐pyrazinecarboxylate)
The syntheses, crystal structures and magnetic properties of four rhenium(IV) compounds of formulae NBu4[ReCl5(pyzCOOH)]·H2O (1), [ReCl5(µ-pyzCOO)M(dmphen)2]·2CH3CN [M = Ni (2) and Co (3)] and {[ReCl5(µ3-pyzCOO)]2Mn2(dmphen)3}n (4) (NBu4 = tetra-n-butylammonium cation, pyzCOOH = 2-pyrazinecarboxylic acid, dmphen = 2,9-dimethyl-1,10-phenanthroline) are reported herein. Compound 1 was obtained by the reaction of NBu4[ReCl5(dmf)] (dmf = dimethylformamide) with pyzCOOH in acetone, whereas the other complexes were obtained by the reaction of 1 with M(ClO4)2·6H2O [M = Ni (2), Co (3), Mn (4)] and dmphen in acetonitrile. Complex 1 is a mononuclear compound, 2 and 3 are neutral heterodinuclear compl…
New hexanuclear FeIII clusters with the gem-diol hydrated form of di(2-pyridyl)ketone and carboxylato ligands: Crystal structures and magnetic properties
Abstract The hexanuclear compounds [Fe6O2Cl2{(py)2CO2}2(pyOH)2(pyCOO)2(ButCOO)6] (1) and [Fe6O2{(py)2CO2}2(pyCOO)4(ButCOO)6] (2) were obtained by condensation of the trinuclear μ3-oxo-centered iron(III) pivalate [Fe3O(ButCOO)6(H2O)3]+ in the presence of di(2-pyridyl)ketone [(py)2CO] in MeCN at ambient temperature. Both complexes contain an analogous core which can be described as two {Fe3O}7+ units joined by gem-diolato (py)2CO22− bridges. Variable-temperature magnetic susceptibility measurements in polycrystalline samples of 1 and 2 reveal strong antiferromagnetic couplings between the iron(III) ions leading to S = 0 ground states.
CCDC 1036871: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Ricardo González, Donatella Armentano, Giovanni De Munno, Miguel A. Novak, Francesc Lloret, Miguel Julve, Carlos Kremer and Raúl Chiozzone|2016|Eur.J.Inorg.Chem.||1835|doi:10.1002/ejic.201501487
CCDC 1901540: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Walter Cañon-Mancisidor, Jorge S. Gancheff, Robert A. Burrow, Donatella Armentano, Francesc Lloret, Ricardo González, Carlos Kremer, Raúl Chiozzone|2019|Polyhedron|174|114165|doi:10.1016/j.poly.2019.114165
CCDC 1901541: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Walter Cañon-Mancisidor, Jorge S. Gancheff, Robert A. Burrow, Donatella Armentano, Francesc Lloret, Ricardo González, Carlos Kremer, Raúl Chiozzone|2019|Polyhedron|174|114165|doi:10.1016/j.poly.2019.114165
CCDC 1579781: Experimental Crystal Structure Determination
Related Article: Lorena Martínez, Livia Arizaga, Donatella Armentano, Francesc Lloret, Ricardo González, Carlos Kremer, Raúl Chiozzone|2018|J.Coord.Chem.|71|748|doi:10.1080/00958972.2018.1441405
CCDC 1036873: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Ricardo González, Donatella Armentano, Giovanni De Munno, Miguel A. Novak, Francesc Lloret, Miguel Julve, Carlos Kremer and Raúl Chiozzone|2016|Eur.J.Inorg.Chem.||1835|doi:10.1002/ejic.201501487
CCDC 1579780: Experimental Crystal Structure Determination
Related Article: Lorena Martínez, Livia Arizaga, Donatella Armentano, Francesc Lloret, Ricardo González, Carlos Kremer, Raúl Chiozzone|2018|J.Coord.Chem.|71|748|doi:10.1080/00958972.2018.1441405
CCDC 1036872: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Ricardo González, Donatella Armentano, Giovanni De Munno, Miguel A. Novak, Francesc Lloret, Miguel Julve, Carlos Kremer and Raúl Chiozzone|2016|Eur.J.Inorg.Chem.||1835|doi:10.1002/ejic.201501487
CCDC 1443218: Experimental Crystal Structure Determination
Related Article: Livia Arizaga, Ricardo González, Donatella Armentano, Giovanni De Munno, Miguel A. Novak, Francesc Lloret, Miguel Julve, Carlos Kremer and Raúl Chiozzone|2016|Eur.J.Inorg.Chem.||1835|doi:10.1002/ejic.201501487