ELECTROCHEMICAL SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF NICKEL(II) AND COPPER(II) COMPLEXES OF TRIDENTATE SCHIFF-BASES - MOLECULAR-STRUCTURE OF THE 5-COORDINATED COPPER(II) COMPLEX - 1,10-PHENANTHROLINE (2-[(2-OXYPHENYL)IMINOMETHYL]PHENOLATO)COPPER(II)

Electrochemical oxidation of metal anodes (copper and nickel) in aceto nitrile solutions of Schiff bases (H(2)L) (synthesized from salicylald ehydes and 2-aminophenols) gave Cut and Nit complexes. When I;IO-phena nthroline (phen) or 2,2'-bipyridine (bipy) was added to the electrolyt ic cell, the mixed complexes CuLL' and NiLL' (L' = phen or bipy) were obtained. The crystal structure of 1,10-phenanthroline {2-[(2-oxypheny l)iminomethyl]phenolate}copper(II) was determined by X-ray diffraction . The structure consists of-monomeric molecules in which the copper at om has a distorted square-pyramidal CuN3O2 kernel.