Ionic salts comprising pyrrolidinium, triazolinium, piperidinium or morpholinium cations and alkyltrifluorophosphate anions

A salt having a cation selected from the group consisting of

• wherein
• R1′ to R4′ each, independently of one another, have the meaning
• hydrogen or CN,
• straight-chain or branched alkyl having 1-20 C atoms,
• straight-chain or branched alkenyl having 2-20 C atoms and one or more double bonds,
• straight-chain or branched alkynyl having 2-20 C atoms and one or more triple bonds,
• dialkylamino containing alkyl groups having 1-4 C atoms, which, however, is not bonded to the heteroatom of the heterocycle,
• saturated, partially or fully unsaturated cycloalkyl having 3-7 C atoms, which may be substituted by alkyl groups having 1-6 C atoms or aryl-C1-C6-alkyl,
• where the substituents R1′ and R4′ may be partially or fully substituted by F, but where R1′ and R4′ are not simultaneously CN or cannot simultaneously be fully substituted by F, where the substituents R2′ and R3′ may be partially or fully substituted by halogens or partially by NO2 or CN,
• and where, in the substituents R1′ to R4′, one or two non-adjacent carbon atoms which are not bonded directly to the heteroatom may be replaced by atoms and/or atom groups selected from the group consisting of —O—, —S—, —S(O)—, —SO2— and —NR′— or by the end group CN, —C(O)X′ or —SO2X′, where R′=H, non-, partially or perfluorinated C1- to C6-alkyl, C3- to C7-cycloalkyl, unsubstituted or substituted phenyl, or an unsubstituted or substituted heterocycle, and X′=OH, F, Cl or Br, and
• an anion having the following formula
• [PFx(CyF2y+1−zHz)6−x]−
• where 2<x<5, 1<y<8 and 0<z<2y+1,
• where 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate is excluded.