Synthesis and characterization of mixed ligand nickel(II) complexes of iminodiacetic acid and hippuric acid

Mixed ligand nickel(II) complexes, Na[Ni[NH(CH2COO)(2)} (C6H5CONHCH2COO)center dot H2O]center dot 6H(2)O and Na[Ni[NH(CH2COO)(2)) (C6H5CONHCH2COO)center dot 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.