Ionic liquids based on imidazolium salts incorporating a nitrile functionality

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 is any anion that provides a salt with a low melting point, below about 100 DEG 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.


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