Synthesis and spectroscopic characterization of copper, nickel and cobalt complexes with N-(N '',N ''-disubstituted-aminothiocarbonyl)-N '-substituted benzamidines

摘要

A series of copper(II), nickel(II) and cobalt(III) complexes with N-(N',N-disubstituted-aminothiocarbonyl)-N'-substitutedbenzam idines have been synthesized and characterized. H-1 and C-13 NMR spectra have shown a mer configuration for the CoL3 compounds. The NiL2 complexes have a square-planar structure. Electron spin resonance spectra have shown that the presence of a bulky substituent on the nitrogen donor atom generates a large tetrahedral distortion around the copper in CuL2 compounds. Cyclic voltammetry has revealed irreversible redox waves corresponding to the Cu(III)-Cu(II) and Cu(II)-Cu(I) couples. (C) 1998 Elsevier Science S.A. [References: 11]