Reactions of chlorine and bromine fluorosulfates with perfluoroalkyl halides in a strongly acidic medium

Abstract

1. Chlorine fluorosulfate is more active than bromine fluorosulfate in the substitution reaction of halogen atom in alkyl halides by the fluorosulfate group. 2. In a fluorosulfonic acid medium containing antimony pentafluoride, the reaction with chlorine fluorosulfate leads to the substitution of the primary chlorine atom in perfluoro-alkyl chlorides, and also the primary and secondary bromine atoms in perfluoroalkyl bromides by the fluorosulfate group under mild conditions.