Organotin(IV) complexes with tridentate ligands .3. Synthesis and characterization of some organotin(IV) complexes with N-(2-pyridinylmethylene)hydrazinecarbothioamide: The X-ray crystal structure of dimethylmonochloro[(N-(2-pyridinylmethylene)hydrazinecarbothioamidato) NS(-1)]tin(IV) hemihydrate

Three organotin(IV) complexes with 2-formylpyridine thiosemicarbazone (HFPT) of formulae [Sn(CH3)(FPT)Cl-2] and [SnR(2)(FPT)Cl] (R = CH3 and C2H5) were prepared and characterized by elemental analysis as well as IR and mass spectral techniques. The X-ray crystal structure of [Sn(CH3)(2)(FPT)Cl]. 0.5H(2)O has been determined. In this complex, the FPT- anion acts as a mononegative NS bidentate ligand, while the pyridine nitrogen remains uncoordinated. The tin(IV) is in a strongly distorted trigonal bipyramidal configuration where the thiol sulphur and the two methyl carbons occupy the equatorial plane while the chloride and the azomethine nitrogen occupy the apical positions. The H-1 and C-13 NMR spectra as well as the electronic absorption spectra of these complexes are discussed.