Bronsted Basicity of Solute Butylamine in an Aprotic Ionic Liquid Investigated by Potentiometric Titration

被引：13
|
作者：
Fujii, Kenta [1 ]
Hashimoto, Kei [1 ]
Sakai, Takamasa [2 ]
Umebayashi, Yasuhiro [3 ]
Shibayama, Mitsuhiro [1 ]
机构：
[1] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan
[2] Univ Tokyo, Sch Engn, Dept Bioengn, Bunkyo Ku, Tokyo 1138656, Japan
[3] Niigata Univ, Grad Sch Sci & Technol, Nishi Ku, Niigata 9502181, Japan
来源：
CHEMISTRY LETTERS | 2013年 / 42卷 / 10期
关键词：
ACID-BASE PROPERTY; ETHYLAMMONIUM NITRATE; GAS-PHASE; ACETONITRILE; DIAMINES; PK(A); MEDIA;
D O I：
10.1246/cl.130537
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The quantitative Bronsted basicity of butylamine (BuNH2) in the typical aprotic ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide, [C(2)mIm(+)][TFSA(-)], is reported. Potentiometric titration was performed for BuNH2 in the aprotic IL to experimentally determine the acid dissociation constant (pK(a)) for butylammonium (BuNH3+). The pK(a) value was estimated to be 16.6(1), and it was found that the value is significantly larger than that in aqueous solution (pK(a) = 10.6).
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收藏
页码：1250 / 1251
页数：2
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