Perfluorooctanesulfonic acid → N-methyl-1-(4-isopropylphenyl) ethylammonium perfluoro-octyl sulphonate

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The perfluoro-octyl sulphonate salt was prepared by mixing a solution of N-methyl-1-(4-isopropylphenyl) ethylamine (17.6 g) in ethanol (20 ml) with a solution of perfluoro-octylsulphonic acid (50 g) in ethanol (150 ml). The ethanol solution was evaporated under reduced pressure and the solid residue was recrystallised from chloroform as soft colourless plates of N-methyl-1-(4-isopropylphenyl) ethylammonium perfluoro-octylsulphonate (60 g). (Found: C 33.05; H 2.43; N 2.09%. C20H20F17NO3S requires: C 35.4; H 2.98; N 2.07%).

Provenance & Evidence