Synthesis and characterization of coordination compounds of organotin(IV) with nitrogen and sulfur donor ligands

The reactions of dimethyltin dichloride with nitrogen and sulfur donor liga nds derived by condensation of S-benzyldithiocarbazate with indol-3-carboxy laldehyde, thiophene-2-aldehyde and furfuraldehyde have been investigated i n 1:1 and 1:2 molar ratios in anhydrous alcohol. These ligands act as monon egatively charged bidentate species and coordinate to the central tin(IV) a tom through the thiosulfur by proton exchange with the azomethine nitrogen. The newly synthesized complexes have been characterized by elemental analy sis, conductance measurements and molecular weight determinations. The mode of bonding and the geometry of the complexes have been suggested on the ba sis of infrared, electronic and H-1, C-13 and Sn-119 NMR spectroscopy, and probable structures have been assigned to these complexes. A few representa tive ligands and their tin(IV) complexes have also been screened for their antifungal and antibacterial activities and found to be quite active in thi s respect. Copyright (C) 2001 John Wiley & Sons, Ltd.