Hexafluoropropylene formation mechanism

Reactions of Sg2+, S42"1", Se82+, Se42+ and Te42+ dications with tetrafluoro-ethylene and hexafluoropropylene usually result in formation of a mixture of products, mainly perfluoropolychalcogenides.187 189 The authors190 suggest a reaction mechanism that involves cyclic key intermediate 160. Alternatively, this transformation can be explained in terms of a free-radical mechanism (Scheme 67). 

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