| abstract |
The invention relates to a process for preparing aromatic sulfonylimides, to the sulfonylimides obtained, and to the use thereof as salt of an electrolyte. The sulfonylimides correspond to the formula [R—SO 2 —N—SO 2 R′] r M (I). R′ is an ArZL- group. R′ is a perfluoroalkyl group or an ArZL- group. Z is an S, SO or SO 2 group. L is a —(CF 2 ) n —CFR f — group. n is 0 or 1; R f represents F or a C 1 to C 8 perfluoroalkyl group; Ar is an aromatic group. M represents H, an alkali metal cation, an alkaline earth metal cation, a trivalent or tetravalent metal cation, or an organic cation. The process consists in preparing a compound RSO2N(R′)SO2R′ from RSO 2 F, and in replacing the group R′ by nucleophilic substitution reaction so as to obtain the compound (I), R′ being a benzyl or trimethylsilyl group. |