Patent ID: 8101777

Claim:
A compound having the general formula, K + A − , in which K + is a 5- or 6-membered heterocyclic ring having 1-3 hetero atoms, which can be independently N, S, or O, with the proviso that at least one of the hetero atoms must be a quaternized nitrogen atom; the heterocyclic ring having up to 5 substituents independently chosen from: (i) H; (ii) halogen; (iii) C 1 to C 12 alkyl, which is unsubstituted or partially or fully substituted by at least one substituent selected from the group consisting of F, C1, N(C n F (2n+1−x) H x ) 2 , O(C n F (2n+1−x) H x ), SO 2 (C n F (2n+1−x) H x ) 2 or C n F (2n+1−x) H x where 1<n<6 and 0<x<13; (iv) phenyl, which is unsubstituted or partially or fully substituted by at least one substituent selected from the group consisting of F, C1, N(C n F (2n+1−x) H x ) 2 , O(C n F (2n+1−x) H x ), SO 2 (C n F (2n+1−x) H x ) 2 or C n F (2n+1−x) H x where 1<n<6 and 0<x≦13; and, (v) —R′CN where R′ is C 1 to C 12 alkyl; wherein the quaternized nitrogen atom of the heterocyclic ring is substituted by the substituent of (v); and, A − is [BF 3 RCN] − wherein R is C 1 to C 12 alkyl.