New dense fluoroalkyl-substituted imidazolium ionic liquids

被引：69

作者：

Singh, RP ^{[1
]}

Manandhar, S ^{[1
]}

Shreeve, JM ^{[1
]}

机构：

[1] Univ Idaho, Dept Chem, Moscow, ID 83844 USA

来源：

TETRAHEDRON LETTERS | 2002年 / 43卷 / 52期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0040-4039(02)02448-6

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

New mono and polyfluoroalkyl-substituted ionic liquids have been synthesized and characterized. The neat reaction of 1-methylimidazole (1a) with 1,1,1-trifluoro-3-iodopropane (2a) at 80degreesC formed the quaternary salt, 1-methyl-3-trifluoropropylimidazolium iodide (3), in 90% yield. Similarly, sodium imidazole (1b) gave good yields of the quaternary salts, 1,3-bis(trifluoropropyl)imidazolium iodide (3b) with an excess of 2a, and 1,3-bis(monofluoropropyl)imidazolium bromide (3c) with an excess of 1-fluoro-3-bromopropane (2b). In water as solvent, metathesis reactions of 3 with KPF6, LiN(SO2CF3)(2) and KSO3CF3, and of 3b and 3c with KPF6 and LiN(SO2CF3)(2) led to 4a-c, 4d,e, and 4f,g, respectively, in good isolated yields. Some of the di(polyfluoroalkyl)imidazolium salts are liquids with densities in excess of 1.8 g/cm(3). (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：9497 / 9499

页数：3

共 15 条

[1] Hydrophobic, highly conductive ambient-temperature molten salts [J].