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Paper | Special issue | Vol 30, No. 1, 1990, pp.543-550
Published online, 1st January, 1970
DOI: 10.3987/COM-89-S50
A 31P NMR Study of Reactions of 2,3-Bis(diohenylphosphino)-6-phenyl-λ3-phosphinine with Sulfer: Formation, Characterization, and Further Reaction of a Stable Phosphinine 1-Sulfide

Alan N. Hughes* and Karen L. Knudsen

*Department of Chemistry, Lakehead University, Thunder Bay, Ontario, P7B 5E1, Canada


The reactions of 2,3-bis(diphenylphosphino)-6-phenyl-λ3-phosphinine with sulfer at room temperature and at elevated temperatures are discussed. Among the products formed is 2-diphenylphosphino-3-diphenylthiophosphinyl-6-phenylphosphinine 1-sulfide, a rare example of a relatively stable heterocycle containing σ3λ5 phosphorus. The route whereby this is formed and its subsequent reaction with traces of H2S slowly generated in the reaction medium are also discussed in the light of nmr evidence.