PREPARATION AND CHARACTERIZATION OF SOME BINARY AND TERNARY METAL COMPLEXES OF IMIDAZOLE AND AMINO ACIDS

Five new ternary metal complexes containing imidazole and glycylglycine or amino acid have been prepared and characterized by proton magnetic resonance and infrared spectral studies. Seven new binary metal complexes have also been prepared and studied. The isolation of Cd(imidazole)6Cl2•H2O and Ni(imidazole)6-Cl2•4H2O provides evidence that the coordination number of these metal ions to imidazole in the solid state is six. The visible spectra of the Ni(II) complexes of amino acid and imidazole show that all these are octahedral in aqueous solution.