Triphenylphosphine sulfide
Triphenylphosphine sulfide is the organophosphorus compound with the formula 3PS, usually written Ph3PS. It is a colourless solid, which is soluble in a variety of organic solvents.
Structurally, the molecule resembles the corresponding oxide, with idealized C3v point group symmetry. It is weakly nucleophilic at the sulfur atom.Applications
Triphenylphosphine sulfide is useful for the conversion of epoxides to the corresponding episulfides:In analytical chemistry, triphenylphosphine is used for the analysis of certain kinds of sulfur compounds. Elemental sulfur, as occurs in some oils, and labile organosulfur compounds, such as organic trisulfides, react with triphenylphosphine to give Ph3PS, which can be detected by gas chromatography.
