PROCESS FOR THE PREPARATION OF POLYFLUOROCARBONYL COMPOUNDS AND SOME NEW REPRESENTATIVES OF THIS CLASS OF COMPOUNDS

摘要

Perfluorocarbonyl compounds of the formula IV IV in which Rf denotes perfluoroalkyl, R'f denotes perfluoroalkylene, R denotes F, Cl, perfluoroalkyl or -OR''',(R''' = alkyl, aryl or aralkyl) and n denotes a number from 0 to 10, are prepared, starting from compounds of the formula I I in which Rf, R'f and n have the same meaning as in the formula IV and R" is F, Cl or perfluoroalkyl, by electrolysis in an electrolyte consisting of fluorosulfonic acid/alkali metal fluorosulfonate. Most of the compounds IV are new. The compounds are used as intermediates in the preparation of perfluoroketocarbonyl compounds.