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.
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页码：694 / 696
页数：2
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