Thermochemical characteristics of nicotinamide protolytic equilibria in water-dimethylsulfoxide mixtures

被引：0

作者：

K. V. Grazhdan

G. A. Gamov

S. V. Dushina

V. A. Sharnin

机构：

[1] Ivanovo State University of Chemical Technology,

来源：

Russian Journal of Physical Chemistry A | 2012年 / 86卷

关键词：

nicotinamide; protonation; enthalpy; heat effect; dimethylsulfoxide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The heat effects of nicotinamide protonation in water-dimethylsulfoxide (DMSO) solutions over the concentration range 0–0.75 DMSO mole fractions were determined calorimetrically at 25.00 ± 0.01°C and ionic strength 0.25 (NaClO4). Changes in the enthalpy of protonation as the content of DMSO increased were found to be described by an S-shaped curve. This curve shape was caused by the dynamics of reagent solvation contributions as the concentration of DMSO grew with the predominance of the nicotinamide solvation contribution.

引用

页码：694 / 696

页数：2

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