Synthesis, Characterization and X-Ray Diffraction Studies of Some Co(II), Ni(II), Cu(II) and Zn(II) Complexes of Schiff Base Derived from p-Dimethylamino benzaldehyde and Anthranilic Acid

Abstract

The solid complexes of Co(II), Ni(II), Cu(II) and Zn(II) with tridentate Schiff base (PDBAA) derived from p-dimethylamino benzaldehyde and anthranilic acid have been synthesized and characterized by elemental analysis, molar conductivity, IR, ¹H NMR, electronic spectra, magnetic susceptibility and X-ray diffraction spectra. From the analytical and spectral data, the stoichiometry of the complexes has been found to be 1 : 1 (metal : ligand). The metal chelates have a general formula [M(PDBAA).H₂O)] where M = Co(II), Ni(II), Cu(II) and Zn(II). IR spectral data suggest that the ligand PDBAA behaves as a monobasic tridentate ligand with N : N : O donor sequence towards metal ions. Magnetic susceptibility measurement indicates paramagnetic behaviour of all complexes except zinc complex. X-ray diffraction studies suggest monoclinic crystal system for these complexes.