SYNTHESIS, SPECTROSCOPIC STUDIES, AND BIOLOGICAL ACTIVITY OF ORGANOSILICON(IV) COMPLEXES OF LIGANDS DERIVED FROM 2-AMINOBENZOTHIAZOLE DERIVATIVES AND 2-HYDROXY-3-METHOXY BENZALDEHYDE

The Schiff bases derived from the condensation of 2-aminobenzothiazole derivatives and 2-hydroxy-3-methoxybenzaldehyde and their silicon(IV) complexes with the general formula R2Si(L)Cl (R = Et, Bu, Ph, L = 2-(2-hydroxy-3-methoxy) benzylideneaminobenzothiazole) have been synthesized. These complexes have been characterized by elemental analysis, molar conductance, and spectroscopic studies including IR and NMR (H-1, C-13, and Si-29) spectroscopy. The analytical data suggest trigonal bipyramidal geometry around the silicon atom in the resulting complexes. The ligands and their organosilicon complexes have also been evaluated for in vitro antimicrobial activity against bacteria (Staphylococcus aureus, Bacillus subtilis, and Escherichia coli) and fungi (Aspergillus niger and Candida albicans). The complexes were found to be more potent as compared to the ligands.