Synthesis, Characterization and X-Ray Diffraction Studies of Co(II), Ni(II) and Pd(II) Complexes of Schiff Base Derived from 3-Hydroxy benzaldehyde and 3-Hydroxy-2-naphthoic hydrazide

Schiff base ligand (L) was synthesized using 3-hydroxy benzaldehyde and 3-hydroxy-2-naphthoic hydrazide. The complexes of cobalt(II), nickel (II) and palladium(II) with this bidentate ligand were synthesized having metal:ligand stoichiometry 1:2 or 1:1. The ligand and respective complexes were characterized for their analytical parameters and various spectral features. The structures of these complexes were proposed on the basis of elemental analysis, molar conductivity; IR, H-1 NMR, thermogravimetric method, electron absorption spectra and X-ray diffraction. The IR spectral data suggest that the ligand (L) behaves as a monobasic bidentate ligand with nitrogen and oxygen donor atoms towards metal ions. Magnetic susceptibility measurement indicates paramagnetic behaviour for Co(II), Ni(II) complexes and diamagnetic behaviour for Pd(II) complex. X-ray diffraction studies suggest orthorhombic crystal system for all the complexes.