| abstract |
Novel chemical compounds of the general formula K+A-, in which K+ is a 5- or 6- membered heterocyclic ring having 1-3 hetereo atoms, which can be independently N, S, or 0; 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 (C1 to C12); the heterocyclic ring having up to 4 or 5 substituents independently chosen from the moieties: (i) H; (ii) halogen or (iii) alkyl (C1 to C12) , which is unsubstituted or partially or fully substituted by further groups, preferably F, Cl, N(CnF(2n+1-x)Hx)2, O(CnF(2n+1-x)Hx), S02(CnF(2n+1-x)Hx)2 or CnF(2n+1-x)Hx where 1<n<6 and 0<x<13; and (iv) a phenyl ring which is unsubstituted or partially or fully substituted by further groups, preferably F, Cl, N(CnF(2n+1-x.)Hx.)2, O(CnF(2n+1-x)Hx), S02(CnF(2n+1-x)Hx)2 or CnF(2n+1-x)Hx where 1<n<6 and 0<x≤13; and A- is any anion that provides a salt with a low melting point, below about 100 °C; A- can be halide, BF4- , PF6-, N03-, CH3CO2-, CF3SO3-, (CF3SO2)2N-, (CF3SO2)3C- CF3CO2- or N(CN)2- or [BF3RCN]-. These compounds can be used as industrial solvents, especially as ligands for efficient catalyst recycling. |