Synthesis and investigation of complex formation between amino acid (glycine) and various metal ion by using spectroscopic methods

Faliah Hassan Ali Al-Jeboori a

Abstract

The solid complexes of [M(C2H4O2N)2 .H2O] [where M: Mn+2, Cu+2, Co+2, Ni+2, Zn+2, Cd+2 and Pb] were obtained from the reaction of chloride salt of cobalt (II), cupper (II), Nickel (II), Manganese (II), Zinc (II), Cd (II), and Pb(II), with the sodium salt of the amino acid glycine . The complexes characterized by mean infrared, microelemental analysis (C.H.N) and atomic absorption analysis (A.A.S). The amino acid act as bidentate ligand with coordination involving the carboxylic oxygen and nitrogen atom of amino group. The V(C=O), Vst(N-H) and Vb(N-H) vibration are shifted to higher frequencies for complexes comparable with ligand the atomic absorption spectroscopy and microelemental analysis, confirms the compounds stoichiometry. The compounds show poor solubility in water and in the common organic solvents. This behavior is consistent with a polymeric chain.