Electrochemical synthesis of benzoylglycine and ethylphthaloyl-glycine complexes of transition metal ions

Summary The direct electrochemical oxidation of metallic iron, cobalt, nickel and copper in Me₂CO solution of benzoylglycine and/or ethylphthaloylglycine gave products with high yields. For each of the complexes, the electrochemical efficiency is commensurate with the metals being divalent. Conventional physical and chemical studies were used to characterize the isolated complexes and octahedral geometry was suggested for them on the basis of magnetic and electronic spectral studies. The i.r. spectra show that the ligands coordinate in a bidentate fashion; the carboxylate ion is monodentate. The molar conductances agree with the complexes being non-electrolytes.