New Mono-Organotin (IV) Dithiocarbamate Complexes

Eighteen new mono-organotin dithiocarbamate compounds derived each nine from methyltin(IV) and phenyltin(IV) reacted using in-situ method with various type of N-dialkylamine together with carbon disulphide with the ratio of 1:3:3. Elemental and gravimetric analysis showed that the general formula of these compounds were RSnCl[S2CNR'R ''](2) (R= Ph, CH3, R' = CH3, C2H5, C(7)H(7)and R '' = C2H5, C6H11, iC(3)H(7), C7H7). These compounds had been characterized by infrared spectroscopy, ultraviolet spectroscopy, H-1, C-13 NMR spectroscopy and single crystal X-ray crystallography. The infrared spectra of these compounds showed three important peaks indicating the formation of dithiocarbamate compounds, nu(C - N), nu(C - S) and nu(Sn-S) band which present in the region of 1444-1519, 954-1098 and 318-349 cm(-1) respectively. The ultraviolet-visible spectra showed an absorption band for the pi - pi* transition of N - C - S group in the range of 253 - 259 nm due to the intramolecular charge transfer of the ligand. The C-13 NMR spectra showed an important shift for delta((NCS2)-C-13) in the range of 196.8 - 201.9 ppm.. Single crystal X-ray diffraction studies showed three new structures with the general formula of PhSnCl[S2CN(Et)(i-Pr)](2), MeSnCl[S2CN(Me)(Cy)](2) and MeSnCl[S2CN(i-Pr)(CH2Ph)](2). All structures having a distorted octahedral geometry set by CClS4 donor atom from the two chelating dithiocarbamate ligands.