Synthesis, spectral studies and antimicrobial evaluation of 6,6--(1,2-benzenediazo) bis (3-amino benzoic acid) complexes with some metal ions

Abstract

The Ligand 6,6--(1,2-benzenediazo) bis (3-aminobenzoicacid) derived from o-phenylenediamine and 3-aminobenzoicacid was synthesized. The prepared ligandwas identified by Microelemental Analysis, 1HNMR, FT-IR and UV-Visspectroscopic techniques. Treatment of the ligand with the following metal ions (CoII, NiII, CuII and ZnII ) in aqueous ethanol with a 1:1 M:L ratio and at optimum pH.Characterization of these compounds has been done on the basis of elementalanalysis, electronic data, FT-IR and UV-Vis, as well as magnetic susceptibility andconductivity measurements. The nature of the complexes formed were studiedfollowing the mole ratio and continuous variation methods, Beer's law obeyed over aconcentration range (1 ×10-4 - 3×10-4 M). High molar absorbtivity of the complexsolutions were observed. On the basis of physicochemical data tetrahedral geometrieswere assigned for the complexes. The ligand and metal complexes were screened fortheir antimicrobial activity.