SYNTHESIS, SPECTRAL STUDY AND ANTIBACTERIAL ACTIVITY OF ASYMMETRICAL TETRADENTATE SCHIFF BASE COMPLEXES

The Ligand 3,3|-((1E,1|E)-((4-methyl-1,2phenylene)bis(azanylylidene))bis(methanylylidene))bis(naphthalene-2-ol) ( L) have been used to synthesize four new Cr(III), Co(II), Zn(II),and Cd(II) complexes(1-4). The Ligand (L) was derived from the condensation of 3, 4diamino Toluene and 2hydroxy naphthaldehyde in 1:2 molar ratio. The ligand and four new metal complexes were characterized by Spectroscopic studies. Physical methods such as Melting points, Elemental Analysis, and Magnetic moment properties. The FT-IR spectral data indicate that the synthesized ligand was coordinated with the metal ion in a tetradentate manner. The UV/Visible spectra and magnetic moment data showed octahedral geometry for Cr(III) and Co(II) complexes whereas Zn(II) and Cd(II) showed distorted square pyramidal structure. The magnetic moment of metal complexes was low as expected. The synthesized metal complexes were insoluble in many organic solvents thus supports the proposed structure. The tetradentate Schiff base ligand and complexes (1-4) were tested against bacteria E. coli, B. megaterium and P. aeruginosa for their antibacterial activity for the determination of inhibition potential.