Studies on Cu(Il), Zn(II), Ni(II) and Co(II) complexes derived from two dipeptide Schiff bases

Some new metal complexes of two dipeptide Schiff bases derived from salicyl aldehyde and dipeptides such as glycyl-Dl-alanine and glycyl-DL-phenylalani ne have been synthesized and characterized by elemental analysis, molar con ductance, IR, UV spectra, TG and DTA studies. The COO stretching bands in I R spectra suggest that the carboxylate acts as a monodentate group when bin ding with metal. The ligands are coordinated to the central metal as tetrad entate ligands. The bonding sites are the carboxylate oxygen, imino nitroge n, amide nitrogen and phenolic oxygen.