Аннотация:Perfluoroallyl iodide undergoes thermally-induced addition to tetrafluoroethylene already at 70-90oC to give mainly 5-iodoperfluoropentene, which is a key intermediate for the synthesis of a new fluorosulfonylperfluoropentyl vinyl ether, which is of interest as a monomer for the preparation of perfluorosulfonic acid proton exchange membranes.