Synthesis,properties, and crystal structures of mononuclear nickel(II) and copper(II) complexes with 2-oximino-3-thiosemicarbazone-2,3-butanedione |
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| Authors: | Ki-Young Choi Seung-Man Yang Kyu-Chul Lee Haiil Ryu Chan Hee Lee Jungho Seo Mancheol Suh |
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| Institution: | (1) Department of Chemistry Education, Kongju National University, Kongju, 314-701, Korea;(2) Department of Culture Heritage Conservation Science, Kongju National University, Kongju, 314-701, Korea;(3) Department of Geoenvironmental Science, Kongju National University, Kongju, 314-701, Korea |
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| Abstract: | The tridentate ligand 2-Oximino-3-thiosemicarbazone-2,3-butanedione (Hotsb) reacts with MCl2 (M = Ni2+ or Cu2+) to give rise to the mononuclear complexes Ni(Hotsb)2]Cl2 · H2O (1) and Cu(Hotsb)Cl2] · H2O (2). These complexes have been characterized by X-ray crystallography, spectroscopy, and cyclic voltammetry. The nickel(II) ion
in (1) is in a six-coordinate octahedral environment being bonded to the two protonated tridentate ligands which occupy mer positions. The copper(II) ion in (2) is in a five-coordinate square-pyramidal geometry, in which the basal plane is made up the two nitrogens, sulfur, and chloride
atom, while the other chloride atom is coordinated at the axial position. The cyclic voltammogram of the complexes displays
two one-electron waves corresponding to MII/MIII and MII/MI processes. The electronic as well as infrared spectral properties of the title complexes are reported and discussed. |
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