Synthesis and Spectral Studies of Some Transition Metal Complexes of Schiff Base

Abstract

The Schiff base has been prepared by condensing 4-[N,N-dimethylamino]benzaldehyde with o-aminophenol in ethanolic media, form three new metal complexes of the formulae of [NiL(OH)(H₂O)].5H₂O and [ML(OH)₂(H₂O)₂].4H₂O in which M represents Cr(III) or Fe(III) ion. These complexes were characterized by elemental analysis, molar conductance measurements, infrared and electronic spectra. The elemental analysis data exhibit the formation of 1 : 1 [M : L] ratio. The molar conductance measurements of the Schiff base complexes reveal the existence of non-electrolytic nature. Infrared spectral data display that the complexation occurs through oxygen atom of the hydroxyl group in the o-amino phenol ligand and the nitrogen atom of azomethine group. The electronic spectral data of the complexes suggest a square-planar geometry for Ni(II) complex and  an octahedral structure for Cr(III) and Fe(III) complexes.