Spectral studies and antimicrobial activities of organosilicon(IV) and organotin(IV) complexes of nitrogen and sulfur donor Schiff bases derived from 4-amino-5-mercapto-3-methyl-s-triazole

Some new organosilicon(IV) and organotin(IV) complexes formulated as R2SiCl[L-1], R2SiCl[L-2], R2Si[L-1](2), R2Si[L-2](2), R2SnCl[L-1], R2SnCl[L-2], R2Sn[L-1](2), and R2Sn[L-2](2) have been synthesized by the reactions of Me2SiCl2 and Me2SnCl2 with Schiff bases in 1:1 and 1:2 molar ratios. L-1 [2-(chlorobenzylidineamino)-5-mercapto-3-methyl-s-triazole] and L-2[4-(flourobenzylidineamino)-5-mercapto3-methyl-s-triazole] have been synthesized by the condensation of 2-chlorobenzaldehyde and 4-flourobenzaldehyde with 4-amino-5-mercapto-3methyl-s-triazole. Newly synthesized organosilicon and organotin complexes have been characterized by elemental analysis, molar conductance measurements, spectral studies, including UV, IR, H-1, C-13, Si-29, and Sn-119 NMR. The nature of these complexes is non-electrolytic. With the help of these techniques, trigonal bipyramidal and octahedral geometries are proposed for the newly synthesized complexes. The biological activity of these complexes against various bacteria and fungi has been investigated and then compared with free ligands.