Metal-Complexes As Ligands to Generate Asymmetric Homo- and Heterodinuclear MAIIIMBII Species: a Magneto-Structural and Spectroscopic Comparison of Imidazole-N versus Pyridine-N
作者： Biplab Biswas , Sunita Salunke-Gawali , Thomas Weyhermüller , Vinzenz Bachler , Eckhard Bill
DOI: 10.1021/IC9018426
关键词: Stereochemistry 、 Imidazole 、 Crystallography 、 Metal 、 Isostructural 、 Pyridine 、 Oxime 、 Chemistry 、 Octahedron 、 Cyclic voltammetry 、 Electron paramagnetic resonance
摘要: Ten hetero- and homodinuclear MAIIIMBIII complexes, 1−10, containing the metal centers FeIIIZnII (1), FeIIICuII (2), FeIIINiII (3), FeIIIFeII (4), FeIIIMnII (5), CrIIINiII (6), CrIIIZnII (7), GaIIINiII (8), CoIIIFeII (9), MnIIIMnII (10) are described. The tridentate ligation property of divalent complexes tris(1-methylimidazole-2-aldoximato)metal(II) with three facially disposed pendent oxime O-atoms has been utilized to generate said complexes. Complexes were characterized by various physical methods including MS, IR, UV−vis, Mossbauer EPR spectroscopy, cyclic voltammetry (CV), variable-temperature (2−290 K) magnetic susceptibility, X-ray diffraction techniques. Binuclear 1−10 contain oximato anions as bridging ligands isostructural in sense that they all a metal(III) ion, LMAIII (L = 1,4,7-trimethyl-1,4,7-triazacyclononane), distorted octahedral environment MAIIIN3O3 second six-coordinated MBII, trigonally ...
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