Thermal properties and bromine addition reaction of ionic liquids containing vinyl-substituted bis-sulfonylamide anion

Ionic liquids (ILs) comprising alkylammonium cations and a bis(sulfonyl)amide anion with a vinyl substituent (SO2CF3-N--SO2CH = CH2) were synthesized. Their thermal properties and water miscibility were investigated and compared with those of the corresponding Tf2N (= (SO2CF3)2N-) salts. Exposure of these ILs to bromine vapor produced bromine adducts, tribromide salts, and a small amount of a cyclic adduct derived from the anion. The reaction products and the potassium salt of the anion were characterized crystallographically.