Synthesis and Characterization of Mixed Ligand Nickel(II) Complexes of Iminodiacetic Acid and Hippuric Acid

Abstract

Mixed ligand nickel(II) complexes, Na[Ni{NH(CH₂COO)₂} (C₆H₅CONHCH₂COO)·H₂O]·6H₂O and Na[Ni{NH(CH₂COO)₂} (C₆H₅CONHCH₂COO)·H₂O] formed with iminodiacetic acid and hippuric acid have been synthesized. Their mode of coordination and the structures have been investigated using infra-red spectra, electronic spectra and magnetic measurements. Iminodiacetic acid has been found to act as a tridentate ligand with the coordination occurring through the carboxylate oxygen atoms and the nitrogen atom. Hippuric acid behaves as a bidentate ligand coordinating through the carboxylate oxygen atom and the nitrogen of the amido group. The sixth coordination position is satisfied by the water molecule.