| abstract |
Novel chemical compounds of the general formula n K + A − , n in which K + is a 5- or 6-membered heterocyclic ring having 1-3 hetereo atoms, which can be independently N, S, or O; n with the proviso that at least one of the hetereo atoms must be a quaternized nitrogen atom having a —R′CN substituent, wherein R′ is alkyl (C 1 to C 12 ); n the heterocyclic ring having up to 4 or 5 substituents independently chosen from the moieties: n (i) H; n (ii) halogen or n (iii) alkyl (C 1 to C 12 ), which is unsubstituted or partially or fully substituted by further groups, preferably F, Cl, 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 n (iv) a phenyl ring which is unsubstituted or partially or fully substituted by further groups, preferably F, Cl, 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 n A − is any anion that provides a salt with a low melting point, below about 100° C.; A can be halide, BF 4 −, PF 6 − , NO 3 − , CH 3 CO 2 − , CF 3 SO 3 − , (CF 3 SO 2 ) 2 N − , (CF 3 SO 2 ) 3 C − , CF 3 CO 2 − or N(CN) 2 − or [BF 3 RCN] n These compounds can be used as industrial solvents, especially as ligands for efficient catalyst recycling. |