N-(Trifluoromethylsulfonyl)trifluoromethanesulfinimidic acid and its salts

Lithium, sodium and potassium N-(trifluoromethylsulfonyl)trifluoromethanesulfinimidates were obtained by the reaction of the corresponding sulfinimidoyl chloride with alkali metal trimethylsilanolates. The potassium and sodium salts were converted to the free acid, having predominantly the amidic tautomeric structure, CF3S(O)NHSO2CF3, by treatment with concentrated H2SO4 or with H+-cationite.