Organotin unsymmetric dithiocarbamates: synthesis, formation and characterisation of tin(II) sulfide films by atmospheric pressure chemical vapour deposition

A series of tin unsymmetric dithiocarbamate complexes have been made from m etathesis reaction of [CH3(C4H9)NSC2]Li and RnSnCl4-n; [RnSn(S2CN(C4H9)CH3) (4-n)] [n = 3, R = Me (1), Bu (2), Ph (3); n = 2, R = Me (4), Bu (5), Ph (6 ); n = 1, R = Me (7), Bu (8), Ph (9)]. The complexes were characterised by microanalysis, C-13, H-1 and Sn-119 NMR, Mossbauer and, in the case of 3, b y X-ray diffraction, which revealed one short Sn-S [2.4631(9) Angstrom] and one long Sn-S interaction [3.084(l) Angstrom] indicative of a weakly chela ting dithiocarbamate ligand. Atmospheric pressure chemical vapour depositio n using I and 8 with H2S at 350-550 degreesC produced SnS and Sn2S3 films o n glass substrates. The tin sulfides were analysed by Raman, EDAX, SEM and band gap measurements. Growth rates were of the order of 150 nm min(-1). (C ) 2001 Published by Elsevier Science Ltd.