MIXED-LIGAND COMPLEXES OF NI(II) AND CU(II) WITH N-(2-ACETAMIDO) IMINODIACETIC ACID AND SOME DICARBOXYLIC AMINO-ACIDS

The synthesis of Cu(II) and Ni(II) ternary complexes with N-(2-acetami do)iminodiacetate (ADA(2-)) and dicarboxylic amino acids is described. Characterization of the so obtained complexes was accomplished by ele mental analyses, thermal decomposition, electronic and IR spectroscopy as well as conductivity measurements. The primary ligand (ADA(2-)) is coordinated to the metal ion in a divalent, tridentate manner, wherea s the dicarboxylic amino acids act as monovalent, bidentate ligands. T he complexes all have a metal to ligands ratio of 1:1:1 and are sugges ted to have an octahedral structure for the Ni(II) complexes and a tet ragonally distorted structure for the Cu(II) complexes.