New Trisubstituted Imidazolium-Based Room Temperature Ionic Liquids
Reaction of 1-decyl-2-methylimidazole ( 1 ) with linear bromoalkanes 2a , 2b in refluxing acetonitrile leads to the formation of quaternary bromide salts 3a , 3b in excellent isolated yields. Quaternary salts 3a , 3b were metathesized with KPF 6 ( 4a ), LiNTf 2 ( 4b ), LiBF 4 ( 4c ), or KOTf ( 4d ) in water to form the ionic liquids 5a - 5h in very good yields. These new ionic liquids are liquid at ambient temperature, immiscible with water, miscible with acetone and chloroform and thermally stable up to 350 °C.