Influence of Dielectric Constant on Protonation Equilibria of L-Aspartic Acid in Acetonitrile- and Ethylene Glycol-Water Mixtures

被引：0
|
作者：
Kumar, Nethala Vijaya [1 ]
Rao, Gollapalli Nageswara [1 ]
机构：
[1] Andhra Univ, Sch Chem, Visakhapatnam 530003, Andhra Pradesh, India
来源：
ACTA CHIMICA SLOVENICA | 2011年 / 58卷 / 02期
关键词：
Protonation constants; L-Aspartic acid; Acetonitrile; Ethylene glycol; L-GLUTAMIC ACID; 1,2-PROPANEDIOL-WATER MIXTURES; L-METHIONINE; VOLUMES; MEDIA; IONS;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The protonation constants of L-Aspartic acid have been studied pH-metrically in various concentrations (0-60% v/v) of acetonitrile- and ethylene glycol-water mixtures maintaining an ionic strength of 0.16 mol L(-1) at 303K. The protonation constants have been calculated with the computer program MINIQUAD75 and are selected based on statistical parameters. Linear variation of step-wise protonation constants (log K) with the reciprocal of the dielectric constant of the solvent mixture has been attributed to the dominance of the electrostatic forces.
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页码：342 / 346
页数：5
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