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

Article abstract of DOI:10.1016/S0020-1693(97)05698-3

A series of copper (II), nickel (II) and cobalt(III) complexes with N-(N″, N″-disubstituted-aminothiocarbonyl)-N′-substitutedbenzamidines have been synthesized and characterized. ¹H and ¹³C 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.