SPECTRAL, THERMAL AND BIOLOGICAL STUDIES OF THIOSEMICARBAZONES OF ORGANOTIN(IV) CHLORIDES

New organotin(IV) complexes of the general formula R(n)SnCl(4-n).L [wh ere n = 3, R = CH3 or C6H5, N = 2, R = C6H5, L = Schiff bases derived from the condensation of thiosemicarbazide with acetophenone (L-1), 4- nitrobenzaldehyde (L-2), glyoxal (L-3), 5-chlorosalicylaldehyde (L-4), cyclohexanone (L-5), 2-hydroxy-1-naphthaldehyde (L-6), 2-methoxybenza ldehyde (L-7), 4-methoxybenzaldehyde (L-8), furfuraldehyde (L-9), sali cylaldehyde (L-10) and benzylmethylketone (L-11)] have been synthesize d and characterized by elemental analyses, conductance measurements, e lectronic, infra-red, far-infra-red, H-1 NMR and 119 Sn Mossbauer spec tral studies. Thermal studies of some of the complexes have been carri ed out using TG, DTG, DTA techniques. Mass loss considerations at main decomposition stages indicate conversion of the complexes to tin(II) sulphide. A distorted octahedral structure has been proposed for all t he complexes. The complexes have also been tested against various path ogenic bacteria and fungi. A few complexes have shown considerable act ivity in comparison to the ligand.