Synthesis,Structure, and Properties of Nickel(II) and Cobalt(II) Coordination Compounds with Optically Active Diaminodioxime (H2L) Derived from 3-Carene. Molecular and Crystal Structures of the [Ni(H2L)(NO3)]NO3 and [Ni(HL)]ClO4 · H2O Complexes |
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| Authors: | Larionov S V Myachina L I Glinskaya L A Klevtsova R F Sheludyakova L A Tkachev A V Bizyaev S N |
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| Institution: | (1) Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent'eva 3, Novosibirsk, 630090, Russia;(2) Novosibirsk Institute of Organic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia |
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| Abstract: | Nickel(II) and cobalt(II) complexes with optically active diaminodioxime (H2L, the derivative of 3-carene) of the compositions Ni(H2L)NO3]NO3 (I), Ni(H2L)Cl2 (II), Ni(HL)]ClO4 · H2O (III), and Co(H2L)Cl2 (IV), were synthesized. According to X-ray diffraction data, the structures of the paramagnetic compound I and diamagnetic complex III are ionic. In the cation of I, the distorted NiN4O2 octahedron is formed by the N atoms of the tetradentate cyclic ligand (H2L molecule) and by the O atoms of NO3
–; anion functioning as bidentate cyclic ligands. In the cation of III, the NiN4 coordination unit is a distorted square formed upon coordination of the tetradentate cyclic ligand, HL–; anion. The data of magnetochemistry and UV-Vis, IR, and Raman spectroscopy suggest that paramagnetic complexes II and IV contain a distorted octahedral polyhedron MCl2N4 (M = Ni, Co). |
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