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Synthesis and characterization of transition metal complexes of bidentate ligands and their antimicrobial studies

Seema I.Habib, Praffullkumar A.Kulkarni

The solid complexes of Cu (II), Ni (II), Co (II), Zn (II),Mn (II) and Fe (III), were prepared frombidentate Schiff base derived from2-aminopyridine and 2, 5-dihydroxy acetophenones. The synthesized metal complexes were characterized by molar conductivity, magnetic susceptibility, thermal analysis, FTIR, 1HNMR, and UV-Visible spectra. The analytical data of these complexes showmetal ligand ratio 1:2. The physicochemical study supports the square planar geometry around Cu (II), Zn (II), Mn (II) and octahedral geometry around Co (II), Fe (III) and Ni (II) ions. The molar conductance values of metal complexes suggest their non electrolytic nature. The IR spectral data reveals that the ligand behaves as bidentate with ON donor atoms sequence towards central metal ion. Antibacterial and antifungal activities of ligands and its metal complexes were performed in vitro against E.coli, S. typhi, S. aureus, B. subtilis and against various fungi like P.chrysogenum, A. niger, F. moniliformae, and A.Flavus.