| Abstract
| - Tris(trimethylsilyl)sulfonium 1 and methylbis(trimethylsilyl)sulfonium 2 ions were prepared aslong-lived species by reacting trimethylsilane and trityl tetrakis(pentafluorophenyl)borate (Ph3C+TPFPB) in the presence of precursor sulfides and characterized by 1H, 13C, and 29Si NMRspectroscopy at −78 °C. Attempted preparation of dimethyl(trimethylsilyl)sulfonium ion undersimilar conditions failed as a result of the formation of the more stabilized trimethylsulfonium ion.Structures, and 13C and 29Si NMR chemical shifts were calculated by density functional theory(DFT)/IGLO methods. The calculated results agree well with the experimental data.
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