Synthesis, Spectral and Thermal Characterization of Cu(II) Complexes with two New Schiff Base Ligand towards Potential Biological Application

The Cu(II) complexes [C15H11N3O3Cu] and [C15H11N3O2SCu] with two new Schiff base ligands HL1(C15H11N3O3) and HL2 (C15H11N3O2S) prepared derived from the condensation reaction of salicylaldehyde with semicarbazide and thiosemicarbazide respectively. where, HL1=bis(2-hydroxybenzylidene)hydrazinecarboxamide and HL2=bis(2-hydroxybenzylidene) hydrazinecarbothioamide. The ligands and complexes were isolated from the reaction in the solid form and characterized by IR ,UV-visible,1H NMR, thermal analysis and some physical measurements. Spectroscopic evidence indicated that the Schiff bases were behaved as N,O coordinating chelating agents. Magnetic susceptibility data coupled with electronic spectra suggested a distorted square planar structure of the complexes. The overall reaction is monitored by TLC and UV-Visible spectral analysis. The Schiff bases and their metal complexes have been shown moderate to strong antimicrobial activity.

Author(s): Md. Saddam Hossain, C M Zakaria, Md. Kudrat-E-Zahan and B Zaman

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