Novel ionic liquids—Imidazolium salts with a difluoromethylene fragment directly bonded to the nitrogen atom

Alkylation of N-(1,1,2,2-tetrafluoroethyl)imidazole (1) by alkyl iodides and metathesis resulting in corresponding tetrafluoroborates and bis(trifluoromethanesulfonyl)amides led to the formation of new type stable ambient temperature ionic liquids 3 and 4 with a difluoromethylene fragment directly bonded to the nitrogen atom.