Reactivite des esters sulfoniques et pyrosulfoniques perfluores RFSO3RF et RFSO3SO3RF heterolyse de la liaison SO

Abstract Perfluoroalkyl perfluoroalkanesulfonates R F SO 3 R′ F (R F , R′ F  CF 3 , C 2 F 5 ) and perfluoroalkyl perfluoroalkanepyrosulfonates R F SO 3 SO 3 R F , mixed with perfluoroalkanesulfonic acids (CF 3 SO 3 H or C 2 F 5 SO 3 H) decompose thermally. Depending on the starting materials, different products result from nucleophilic attack of a perfluoroalkanesulfonate anion of the acid on the sulfur atom of the sulfonate group of the ester, with heterolysis of the SO bond. Therefore, under these conditions, the perfluorinated esters are not perfluoroalkylating agents, but rather perfluorosulfonylating agents.