Abstract
A reaction between VOSO4, 2,6-diacetylpyridine, and nicotinohydrazide in a molar ratio of 1: 1: 2 afforded two complexes differing in both color and crystal shape as well as in chemical composition and molecular structure. The compositions and structures of the vanadium complexes were determined by IR spectroscopy and X-ray diffraction (CIF files CCDCnos. 1411235 (I) and 1411236 (II)). These complexes can be formulated as [V II2 (H2L)2](NO3)4 ∙ H2O (I) and [VIV(=O)(H2L)(SO4)] ∙ 5H2O (II), where H2L is 2,6-diacetylpyridine bis(nicotinylhydrazone). Complex I consists of centrosymmetric dinuclear complex cations [V2(H2L)2]4+, NO -3 anions, and crystal water molecules in a ratio of 1: 4: 1; complex II is built from molecular V(IV) complexes and crystal water molecules in a ratio of 1: 5. The coordination polyhedron of the metal atom in I is a tetragonal pyramid made up of the electron-donating atoms N3O2 of two ligands H2L. The coordination polyhedron of the metal atom in II is a pentagonal bipyramid made up of the electron-donating atoms N3O2 of one neutral five-coordinate ligand H2L and two O atoms coming from the oxo ligand and the SO 2-4 anion coordinated in a monodentate fashion.
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Original Russian Text © P. Bourosh, I. Bulhac, A. Mirzac, S. Shova, O. Danilescu, 2016, published in Koordinatsionnaya Khimiya, 2016, Vol. 42, No. 3, pp. 137–145.
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Bourosh, P., Bulhac, I., Mirzac, A. et al. Mono- and dinuclear vanadium complexes with the pentadentate schiff base 2,6-diacetylpyridine bis(nicotinylhydrazone): Synthesis and structures. Russ J Coord Chem 42, 157–165 (2016). https://doi.org/10.1134/S1070328416030015
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DOI: https://doi.org/10.1134/S1070328416030015