DIORGANOTIN(IV) DERIVATIVES OF SALICYLALDEHYDETHIOSEMICARBAZONE - THE CRYSTAL-STRUCTURE OF DIMETHYL AND DIPHENYL (SALICYLALDEHYDETHIOSEMICARBAZONATO)TIN(IV)

The title compounds have been prepared by reacting the corresponding diorganotin(IV) oxide with salicylaldehyde thiosemicarbazone (H2L). [SnMe2(L)] crystallizes in the monoclinic space group P2(1)/n with a = 9.480(3), b = 13.532(7), c = 10.541(3) angstrom, beta = 100.33(2)-degrees and Z = 4 (R = 0.0230, R' = 0.0258). [SnPh2(L)] crystallizes in the space group P2(1)/a with a = 13.483(8), b = 10.078(l), c = 15.622(4) angstrom, beta = 113.66(4)-degrees and Z = 4 (R = 0.030, R' = 0.031). Both complexes consist of molecules in which the bisdeprotonated ligand is 0,N,S-bonded and the tin atom exhibits distorted pentacoordination, with small differences between the methyl and phenyl derivatives in bond distances, bond angles and intermolecular hydrogen bonds. The spectral properties of the complexes (IR, Mossbauer and H-1, C-13 and Sn-119 NMR spectra) are discussed in the light of this structural information.