Vapor phase, high temperature (450-650") reactions of perfluoroalkanesulfonyl fluorides or fluorocarbon derivatives having the structures RrCFzX (X= H, C1, Br, I) with oxidizing agents, principally SO2, were carried out. SO2 gave, in several cases, good yields of perfluoroalkanecarboxylic acid fluorides; the products usually were isolated as the acids because of hydrolysis and separation problems. RfCFzH compounds require a sensitizing ...
