Novel Complexes of Copper(Ii), Zinc(II), Nickel(II) and Cobalt(II) with the Schiff Base Derived from 2,4-Dihydroxybenzaldehyde and Glycyl-DL-Alanine

Abstract

Several new complexes of the Schiff base obtained by the condensation of glycyl-DL-alanine with 2,4-dihydroxybenzaldehyde were synthesized. The complexes were characterized by elemental analyses, conductivity measurements, infrared and electronic spectra and ¹H NMR. The ligand is coordinated to the central metal as tetradentate ONNO ligand. The bonding sites are the carboxylate oxygen, imino nitrogen, amide nitrogen and phenolic oxygen.