p-Nitrophenolate: A Probe for Determining Acid Strength in Ionic Liquids

被引：31

作者：

D'Anna, Francesca ^{[1
]}

La Marca, Sandra ^{[1
]}

Noto, Renato ^{[1
]}

机构：

[1] Univ Palermo, Dipartimento Chim Organ E Paterno, I-90128 Palermo, Italy

来源：

JOURNAL OF ORGANIC CHEMISTRY | 2009年 / 74卷 / 05期

关键词：

CARBOXYLIC-ACIDS; AROMATIC-COMPOUNDS; BASE EQUILIBRIA; BINARY-MIXTURES; NONPOLAR MEDIA; BRONSTED ACIDS; PK(A) VALUES; SCALE; SUBSTITUTION; SOLVATION;

D O I：

10.1021/jo802473p

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

In order to obtain an acidity scale in room-temperature ionic liquid solutions, the protonation equilibrium of sodium p-nitrophenolate in [bm(2)im][NTf2] and in [bmpyrr][NTf2], at 298 K, has been studied by means of spectrophotometric titration. Carboxylic acids differing in both structure and in water solution strength have been used. Data collected indicate that in the analyzed ionic liquid solutions carboxylic acids are less dissociated than in water solution. Furthermore, by virtue of a mutual interaction, the studied equilibrium seems to be affected by both the nature of the ionic liquids and the carboxylic acids.

引用

页码：1952 / 1956

页数：5

共 61 条

[1] An acidity scale for phosphorus-containing compounds including metal hydrides and dihydrogen complexes in THF: Toward the unification of acidity scales [J].