Electrochemical synthesis of cobalt, nickel, copper, zinc and cadmium complexes with N[(2-hydroxyphenyl)methylidine]N′-tosylbenzene-1,2-diamine.: The crystal structures of {(1,10-phenanthroline)[N-(2-oxophenyl)methylidine]-N-tosylbenzene-1,2-diaminato}nickel(II) and {(1,10-phenanthroline)[N-(2-oxophenyl)methylidine]-N′-tosylbenzene-1,2-diaminato}copper(II)

The electrochemical oxidation of cobalt, nickel, copper, zinc or cadmium anodes in an acetonitrile solution containing N[(2-hydroxyphenyl)methylidine]-N'-tosylbenzene-1,2-diamine (H2L) yielded compounds of general formula [ML]. When 1,10-phenanthroline (phen) or 2,2'-bipyridine (bipy) is added to the cell, mixed ligand complexes are obtained. The crystal structures of {(1,10-phenanthroline)[N-(2-oxophenyl)methylidine]-N'-tosylbenzene-1,2-diaminato}nickel(II) (1) and {(1,10-phenanthroline)-[N-(2-oxophenyl)methylidine]-N'-tosylbenzene-1,2-diaminato} copper(II) (2) were determined by X-ray diffraction. Compound 1 consists of a binuclear [Ni2L21(phen)(2)] complex with phenolic oxygen atoms bridging both nickel atoms. Each nickel atom is in a distorted octahedral [NiN4O2] environment. Compound 2 is monomeric, with the copper atom in a [CuN4O] distorted square pyramidal geometry. The electronic, IR and NMR spectra of the complexes are discussed and related to the structure. (C) 1999 Elsevier Science S.A. All rights reserved.