Novel Metal Complexes as Antimicrobial Agents, Synthesis and Spectroscopic Characterization

Abstract

New Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Mg(II) complexes of ether diamide Schiff-bases have been Synthesized. The ligand and its metal complexes have been characterized using H-NMR, Mass spectra, IR, UV-VIS and ESR spectra, Magnetic moments, Conductance measurements, as well as Elemental and Thermal analyses (DTA and TGA). Molar conductance in DMF solution indicates that, the complexes are non-electrolytes in nature. The electronic spectral data and elemental analyses show that, all complexes have distorted octahedral structure around the metal ions. The ESR spectra of solid Cu(II) complexes show axial type symmetry a d(x-y) ground state with considerable covalent bond character. However, the other complexes show isotropic type. The antimicrobial activity of the ligands and their complexes was studied. The results show that, the complexes were found to be more active than the ligands against the organisms used.