SOLVENT EFFECTS ON THE DISSOCIATION OF ALIPHATIC CARBOXYLIC-ACIDS IN WATER-N,N-DIMETHYLFORMAMIDE MIXTURES

被引：21

作者：

GONZALEZ, AG ^{[1
]}

ROSALES, D ^{[1
]}

GOMEZARIZA, JL ^{[1
]}

SANZ, JF ^{[1
]}

机构：

[1] UNIV SEVILLE,FAC CHEM,DEPT PHYS CHEM,E-41012 SEVILLE,SPAIN

来源：

ANALYTICA CHIMICA ACTA | 1990年 / 228卷 / 02期

关键词：

D O I：

10.1016/S0003-2670(00)80508-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The autoprotolysis constants of several water-N,N-dimethylformamide mixtures were determined. The acid dissociation constants of formic, acetic, propionic, n-butyric, isobutyric, n-valeric, isovaleric, 2-methylbutyric and trimethylacetic acids were evaluated in the same media by potentiometric titration. Empirical equations for the calculation of autoprotolysis constants and acid dissociation constants at 25° C in the mixed solvents are proposed. Approximate solvation numbers were obtained by multiple linear regression analyses of pKa values. © 1990.

引用

页码：301 / 306

页数：6

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