Standard enthalpies and heat capacities of solution of 2,4-dimethyl- and 2,4-diethylglycolurils in water at temperatures from (278.15 to 313.15) K

被引：8

作者：

Ivanov, Evgeniy V. ^{[1
]}

Batov, Dmitriy V. ^{[2
]}

Baranov, Vladimir V. ^{[3
]}

Kravchenko, Angelina N. ^{[3
]}

Abrosimov, Vladimir K. ^{[1
]}

机构：

[1] Russian Acad Sci, GA Krestov Inst Solut Chem, Lab Thermodynam Solut Nonelectrolytes & Biol Act, Ivanovo 153045, Russia

[2] Russian Acad Sci, GA Krestov Inst Solut Chem, Inc Phys & Chem Ctr Solut, Ivanovo 153045, Russia

[3] Russian Acad Sci, ND Zelinsky Inst Organ Chem, Lab Nitrogencontaining Cpds, Moscow 199119, Russia

来源：

THERMOCHIMICA ACTA | 2014年 / 586卷

关键词：

Enthalpy of solution; Heat capacity of solution; Water; 2,4-Dimethylglycoluril; 2,4-Diethylglycoluril; Hydration; AQUEOUS-SOLUTIONS; CHIRAL DRUGS; SOLVATION; GLYCOLURIL; MEBICAR;

D O I：

10.1016/j.tca.2014.04.012

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The molar enthalpies of solution of 2,4-dimethyl- and 2,4-diethylglycolurils (2,4-DMGU and 2,4-DEGU) in water in the temperature range between (278.15 and 313.15)K were measured by microcalorimetry at ambient pressure. Experimental results were used to calculate the standard (at infinite dilution) molar enthalpies of these bicyclic compounds. The changes in molar heat capacities during the dissolution process were derived, too. The enthalpies of solution of both 2,4-DMGU and 2,4-DEGU are positive and increase with temperature. In the case of 2,4-DEGU, the temperature influence on the dissolution enthalpy was found to be more significant. Based on the data on the standard heat capacity of solution, a conclusion was drawn that the hydrophobic hydration of a solute is more pronounced in the aqueous medium containing 2,4-DEGU. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：72 / 74

页数：3

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