Complexes of tris(o-phenanthroline)nickel(II) and copper(II) bromide with dithiocarbamates derived from α-amino acids

Complexes of 1,10-o-phenanthroline (o-phen)-Ni-II and Cu-II with dithiocarbamates derived from alpha -amino acids (glycine, phenylalanine, alanine, methionine and tryptophan) were synthesized and characterized by chemical analysis, spectral and thermal studies and by biological screening; the complexes are non-electrolytes. The empirical formula are [Ni(o-phen)(2)(aadtc)] and [Cu-2(o-phen)(2)(phaladtc)(H2O)(2)Br-2] where, aadtc = glycinyl-, phenylalaninyl-, alaninyl-, methioninyl- and tryptophanyldithiocarbamate and phaladtc = phenylalaninyldithiocarbamate. The structure of these complexes is probably octahedral. Molecular association through hydrogen bonding between the -NH and the carboxylate groups is proposed for the Ni-II complexes. The Cu-II complex is dimeric with the phenylalaninyldithiocarbamate acting as a bridge.