ABSTRACT
The reaction of triphenyltin chloride and trimethyltin chloride with the hydrazinecarboxamide and hydrazinecarbothioamide ligands of Schiff bases in 1:1 stoichiometry afford complexes having general formula [M3Sn(Ll)], [M3Sn(L2)], [M3Sn(L3)], [M3Sn(L4)], where M = triphenyl and trimethyl. New series of bio potent organotin, (IV) complexes were isolated as coloured solids soluble in most of the organic solvents. The coordination behaviour and bonding pattern of these compounds are discussed by the support of electronic, infrared and multinuclear magnetic resonance (1H, 13C and 119Sn NMR) spectral studies. These analyses suggest that the ligands act in a bidentate manner, coordinating metal through the oxygen/sulphur and nitrogen atoms. Trigonal bipyramidal geometry is assigned for 1:1 metal complexes. Their molecular weight determinations show that the complexes are monomeric in nature. Conductivity measurement values in DMF lie in the range of 10-12 ohm-1 cm2 mol-1 indicate them to be non-electrolyte. All the schiff base ligands and their corresponding organotin complexes have also been screened for their antifungal and antibacterial activities against Gram-positive bacterial strain (Staphylococcus aureus) and Gram-negative bacterial strain (Escherichia coli).
