Diaquabis(1H-imidazole-4-carboxylato-κ2N3,O)cobalt(II)

Artetxe, Beñat; Felices, Leire San; Pache, Aroa; Reinoso, Santiago; Gutiérrez‐Zorrilla, Juan M.

doi:10.1107/s1600536813000330

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…This fact indicates retention of the sandwich metal–oxo framework upon reaction. However, remarkable differences are observed when this spectrum is compared with those of the Co 2 Sb 2 precursor and the [Co(imc) 2 (H 2 O) 2 ] complex ( Co-imc ) with imc ligands in the same coordinating fashion . In the organic region, several bands are significantly displaced with respect to the spectrum of Co-imc , especially those above 1400 cm –1 , which are mainly related to stretching vibrations in the imidazole ring and N–H bending.…”

Section: Results and Discussionmentioning

confidence: 89%

Functionalization of Krebs-Type Polyoxometalates with N,O-Chelating Ligands: A Systematic Study

et al. 2014

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The first organic derivatives of 3d-metal-disubstituted Krebs-type polyoxometalates have been synthesized under mild bench conditions via straightforward replacement of labile aqua ligands with N,O-chelating planar anions on either preformed or in situ-generated precursors. Nine hybrid clusters containing carboxylate derivatives of five- or six-membered aromatic N-heterocycles as antenna ligands have been obtained as pure crystalline phases and characterized by elemental and thermal analyses, infrared spectroscopy, and single-crystal X-ray diffraction. They all show the general formula [{M(II)L(H2O)}2(WO2)2(B-β-XW9O33)2](n-) and can be classified as follows: 1-SbM, where L = 1H-imidazole-4-carboxylate (imc), X = Sb(III), n = 12, and M(II) = Mn, Co, Ni, Zn; 1-TeM, where L = imc, X = Te(IV), n = 10, and M(II) = Mn, Co; 2-SbNi, where L = 1H-pyrazole-3-carboxylate (pzc), X = Sb(III), n = 12, and M(II) = Ni; and 3-SbM, where L = pyrazine-2-carboxylate (pyzc), X =Sb(III), n = 12, and M(II) = Co, Zn. The 3d-metal-disubstituted tungstotellurate(IV) skeleton of compounds 1-TeM is unprecedented in polyoxometalate chemistry. The stability of these hybrid Krebs-type species in aqueous solution has been confirmed by (1)H NMR spectroscopy performed on the diamagnetic 1-SbZn and 3-SbZn derivatives. Our systematic study of the reactivity of disubtituted Krebs-type polyoxotungstates toward diazole-, pyridine-, and diazinecarboxylates demonstrates that organic derivatization is strongly dependent on the nature of the ligand, as follows: imc displays a "universal ligand" character, as functionalization takes place regardless of the external 3d metal and heteroatom; pzc and pyzc show selectivity toward specific 3d metals; pyridazine-3-carboxylate and pyrimidine-4-carboxylate promote partial decomposition of specific precursors, leading to [M(II)L2(H2O)2] complexes; and picolinate is inert under all conditions tested.

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Section: Results and Discussionmentioning

confidence: 89%

Functionalization of Krebs-Type Polyoxometalates with N,O-Chelating Ligands: A Systematic Study

et al. 2014

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“…Several polymeric compounds with bridging 1H-imidazole-4-carboxylato ligands have been reported, including one with Ca II (Starosta & Leciejewicz, 2006) and two with Cd II (Yin et al, 2009(Yin et al, , 2012. The structures of monomeric compounds with 1H-imidazole-4-carboxylato-2 N,O ligands and Mg II (Gryz et al, 2007), Mn II (Xiong et al, 2013), Co II Artetxe et al, 2013), Ni II (Zheng et al, 2011), Cu II (Reinoso et al, 2015), and Zn II (Gryz et al, 2007;He, 2006;Shuai et al, 2011) Projections of -stacked molecules. The molecules are related by the symmetry transformations (I) Àx + 1, Ày…”

Section: Database Surveymentioning

confidence: 99%

Structural characterization of two tetrachloridozincate salts of 4-carboxy-1H-imidazol-3-ium: a salt hydrate and a co-crystal salt hydrate

Martens

Geiger

2017

Acta Cryst E

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“…Therefore, the experimental diffractograms of both compounds were compared with those obtained by simulation from the single crystal data published previously 7,14 (Fig 2). The coincidence in the position of the diffraction peaks helps to consider that compounds 1 and 2 correspond to Co(HIMC) 2 (H 2 O) 2 and Co(H 2 IMDC) 2 (H 2 O) 2 respectively.…”

Section: X-ray Powder Diffraction Analysesmentioning

confidence: 99%

Magnetic Analysis of Two [Cobalt-Imidazole-Carboxylate] Complexes: Orbital Contribution

Arrué¹,

Toledo²,

Peña³

et al. 2018

J. Chil. Chem. Soc.

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Two coordination complexes, Co(HIMC) 2 (H 2 O) 2 (1) and Co(H 2 IMDC) 2 (H 2 O) 2 (2), were synthesized by mixing the complex precursor Cobalt(II) hexafluoroacetylacetonate (Co(hfacac) 2 ) with 1H-imidazole-4-carboxylic acid (H 2 IMC) and 1H-imidazole-4,5-imidazoledicarboxylic acid (H 3 IMDC) ligands.These compounds have been isolated as neutral, air and thermal stable solid and have been characterized by FT-IR and powder X-Ray diffraction analysis. The thermal stability and magnetic properties were studied in the solid state.Compounds (1) and (2) are mononuclear complexes, where the cobalt ions adopt an distorted octahedral geometry. At low temperature they exhibit a weak antiferromagnetic interaction. The contribution of the angular momentum to the magnetic moment as well as intermolecular interactions were taken into consideration for the quantitative modeling of their magnetic properties

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Diaquabis(1H-imidazole-4-carboxylato-κ²N³,O)cobalt(II)

Cited by 4 publications

References 6 publications

Functionalization of Krebs-Type Polyoxometalates with N,O-Chelating Ligands: A Systematic Study

Functionalization of Krebs-Type Polyoxometalates with N,O-Chelating Ligands: A Systematic Study

Structural characterization of two tetrachloridozincate salts of 4-carboxy-1H-imidazol-3-ium: a salt hydrate and a co-crystal salt hydrate

Magnetic Analysis of Two [Cobalt-Imidazole-Carboxylate] Complexes: Orbital Contribution

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