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Coordination Behaviour and Biological Activity of Unsymmetrical Bis Hydrazone towards Manganese (II) Ion

Pratibha Mittal and V. Uma

Bis-hydrazones were prepared by condensation of cinnamaldehyde monohydrazone with panisaldehyde, p-chlorobenzaldehyde and m-nitrobenzaldehyde. Manganese (II) complexes of these (Schiff base) bis hydrazones were prepared in 1 : 2 ratio. Elemental analysis, IR, 1H NMR, UV spectral studies and conductance measurement reveals that bis-hydrazones are bidentate ligands with N, N-donor atoms. A tetrahedral geometry was suggested for all the complexes. The Schiff base ligands, and their complexes were tested against different bacteria as well as fungi. The metal complexes exhibited higher antibacterial activities, than the parent ligand and their biopotency is discussed.