Synthesis, characterization and X-ray diffraction studies of Co(II), Ni(II), Cu(II) and Zn(II) complexes with Schiff base derived from 5-nitrosalicylaldehyde and anthranilic acid

Transition metal (II) complexes of the type ML center dot nH(2)O [where M-Co(II), Ni(II), Cu(II) and Zn(II), L-Schiff base derived from 5-nitro salicylaldehyde and anthranilic acid, n=0, 1 ...] have been prepared and characterized by elemental analysis, molar conductivity, IR, electronic spectra, magnetic susceptibility studies and X-ray difraction spectra. Molar conductivity measurements indicate that the complexes are non-electrolytic in nature. From the analytical and spectral data, the stoichiometry of the complexes has been found to be 1:1 (metal:ligand). IR spectral data suggests that the ligand behaves as a monobasic tridentate ligand with O:N:O donor sequence towards metal ions. Magnetic susceptibility measurements indicate paramagnetic behaviour of an the complexes except Zn-complex. X-ray diffraction studies suggest monoclinic crystal system for these complexes.