Abstract

Redox radical chin reactions of trivalent organophosphorus compounds (PZ 3 ) with diaryliodonium (Ar 2 I + ) and triarylsulfonium (Ar 3 S + ) salts to give arylphosphonium (ArP + Z 3 ) salts and iodoarenes (ArI) or diaryl sulfides (Ar 2 S) are reported. The key propagation step in these S RN 1 reactions is a single-electron reduction of the onium salts by intermediate phosphoranyl radicals (ArPZ 3 )

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