Abstract
Heating of 3- and 4-chloroalkyldiphenylphosphine sulfides la,b with sodium iodide in acetone leads to 2,2-diphenyl-l,2λ4-thiaphospholanium iodide 2a and 2,2-diphenyl-l,2λ4-thiaphosphorinanium iodide 2b; relatively uncommon ring-chain halogenotropic tautomerism is observed in solutions of these compounds.
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