Ligation properties of 2-acetyl-2-thiazoline semicarbazone (ATsc): Isolation, spectroscopic and X-ray study of ATsc and its Cu(II) and Ni(II) complexes |
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| Authors: | F.J. Barros-Garcí a, F. Luna-Giles, M.A. Maldonado-Rogado,E. Vi uelas-Zahí nos |
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| Affiliation: | Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Extremadura, Avenida de Elvas sn, 06071 Badajoz, Spain |
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| Abstract: | A new ligand, 2-acetyl-2-thiazoline semicarbazone (ATsc), has been prepared and characterized by a variety of physico-chemical techniques. Likewise, the metal complexes [CuCl2(ATsc)] and [Ni(ATsc)2](NO3)2 · H2O have been isolated and characterized through elemental analysis, IR, UV–Vis–NIR diffuse reflectance and magnetic susceptibility, as well as, in the case of the copper complex, by means of EPR. Moreover, the structures have been determined by X-ray diffraction. In both complexes the Schiff base acts as a tridentate ligand through N(1), N(2) and O atoms, making two five-membered chelate rings. The copper complex consists of monomeric molecules in which the copper atom is five coordinated in a distorted square-pyramidal geometry, with one ATsc and two chlorine ligands. The complex cation of nickel possesses approximately a non-crystallographic C2 symmetry. The environment around the nickel atom may be described as a distorted octahedral geometry with the metallic atom coordinated to two ATsc ligands. |
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| Keywords: | Copper(II) complex Nickel(II) complex Crystal structures Thiazoline Semicarbazone |
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