溴化1-丁基-3-甲基咪唑的合成与表征

Synthesis and Characterization of 1-Butyl-3-methylimidazole Bromide

实验用0.5 mol的CH_3CH_2CH_2CH_2Br和0.5 mo L的C4H6N2合成[BMIM]Br离子液体,得到无色透明的油状液体[BMIM]Br。利用IR表征了[BMIM]Br。离子液体中间体在常用溶剂中的溶解性,[BMIM]Br在C_2H_(50)H、H_2O、CH_3CN、CH_3COOH、CH_3OH、CH_3COCH_3等溶剂中有较好的溶解性;[BMIM]Br在下列溶剂中不溶或难溶:CH_3C_2OCH_2CH_3、CH_3COOCH_2CH_3、CH_3Cl、CCl_4、C_6H_(12)。

Ionic liquid intermediate 1-butyl-3-methylimidazole bromide was synthesized from butyl-imidazole and butyl bromide, and the reaction process was improved. The ionic liquid is transparency and thick. Its structure was characterized and analyzed by infrared spectra. The ionic liquid intermediate solubility in common solvents was investigated. The results show that 1-butyl-3-methylimidazole bromide has good solubility in water, ethanol, methanol, acetic acid, acetonitrile and acetone solvents, and has poor solubility in ether, ethyl acetate, chloroform, carbon tetrachloride and cyclohexane solvents.