COMPOSITION AND COMPOUND BASED ON METAL AND ACID SALT(S) HAVING A SULPHONYL GROUP BORNE BY A PERHALOGENATED CARBON AND THEIR USE AS LEWIS ACID

摘要

The invention concerns a composition, which may be based on metal and acid salt(s) having a sulphonyl group borne by a prehalogenated carbon. Said salts are salts with elements of valence mu with mu at least equal to three comprising as co-anions at least one and not more than ( mu -1) anions bearing a sulphonyl function borne by a perhalogenated atom, preferably perfluorinated, more preferably, a perfluoromethylene group (-CF2-). The invention is applicable to catalysis involving electrophilic cations.