SYMMETRY OF THE COORDINATION SPHERE OF DI-N-BUTYLTIN(IV) IN COMPLEXESWITH SULFANYLCARBOXYLIC ACIDS

Four di-n-butyltin(Iv) complexes have been prepared with sulfanylaceti c, 2-sulfanylpropionic, sulfanylsuccinic and 2,3-disulfanylsuccinic ac id, using two different procedures, The Compounds were characterised b y elemental analysis, Fourier-transform, Raman, Sn-119 Mossbauer, H-1, C-13 and (Sn-NMR)-Sn-119 spectroscopy. The IR and Raman data indicate the presence of bidentate carboxylate groups, non-linear C-Sn-C bonds , and Sn-S bonds. The results of Mossbauer spectroscopic measurements, based on;point-charge model calculations. have Shown the general occu rrence of trigonal-bipyramidal environments at tin(rv). The multinucle ar NMR studies also suggested the (O,S) co-ordination of the di-n-buty ltin(Iv) fragment, within the cyclic oligomeric complexes.