Bis-perfluoroalkane sulphonic acid imides - useful as catalysts and tensi-des, prepd eg from N-trimethyl-silyl-perfluoroalkane sulphonamide

摘要

Title cpds. are of formula RfSO2 - N - SO2R1f (where Rf and R1f = 1-12C (branched) perfluoroalkane gps. and X = H, metal or NH4) and may be prepd. by reaction of alkali-N-trimethyl-silyl-perfluoroalkane sulphonamide with perfluoroalkane sulphonyl fluoride at 50-150 degrees C, pref. in polar solvents.