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Synthesis, characterization and antimicrobial activities of some transitionmetal complexes of biologically active bidentate ligands

D.T.Sakhare, S.G.Shankarwar,A.G.Shankarwar

A new solid complexes of Mn(II) and Fe(III) complexes with bidentate Schiff base ligand derived from 2-amino 4,6 dihydroxypyrimidine and Pchlorobenzaldehyde, P-nitrobenzaldehyde have been reported. The complexes have been characterized by elemental analysis, magnetic susceptibility measurements, conductrometry, electronic and infrared spectra, Xray diffraction, 1H-NMR spectra and therogravimetric analysis. The ligand and its complexes were screened for their antifungal and antibacterial activity against Aspergillus niger, Penicillium chrysogenum, Fusarium moneliforme and Aspergllus flavus. and Escherichia coli,. Salmonellatyphi, Staphylococcus aurious, B.subtilis. The result indicated that the complexes exhibited good antifungal and antibacterial activities. The Schiff base commonly coordinates through the oxygen atom of phenolic OH group and the nitrogen atom of azomethine group,which is confirmed by IR spectral data. Further conclusive evidence of the co-ordination of the Schiff bases with the metal ions was shown by the appearance of new bands due to (M-N) and (M-O) in the metal complexes.