Ionic liquids formed by imidazolium and pyridinium cations with Cl-,Br-,BF-4,and PF-6 anions were used for the catalytic synthesis of（2,3-）dichloropropionitrile by the chlorination of acrylonitrile.The ionic liquids containing Cl-and Br-show good catalytic properties.The Cl-and Br-ions act as strong Lewis bases and molecular chlorine is activated by the induction effect of Cl-and Br-.Due to the stronger steric hindrance effect of the BF-4 and PF-6 anions,the chlorination of acrylonitrile is limited in the ionic liquids containing BF-4 and PF-6 anions.
Multiester-appended imidazolium ionic liquids were synthesized in a quaternizationreaction between the imidazole derivatives carrying single or double esters and ethyl chloroacetateor bromoethane. Multicarboxylic-appended imidazolium ionic liquids were achieved from thehydrolysis of the corresponding ionic liquids. The influences of multifunctional groups on thetransition temperatures and viscosity of these new ionic liquids were investigated.
Wei Guo GENG Xuc Hui LI Le Fu WANG Hong Li DUAN Wei Ping PAN
