INTERACTIONS BETWEEN CATIONS AND SUGARS .3. FREE-ENERGIES, ENTHALPIES, AND ENTROPIES OF ASSOCIATION OF CA-2+,SR-2+,BA-2+,LA-3+,GD-3+ WITH D-RIBOSE IN WATER AT 25-DEGREES-C

被引：35

作者：

ALVAREZ, AM ^{[1
]}

MORELDESROSIERS, N ^{[1
]}

MOREL, JP ^{[1
]}

机构：

[1] UNIV CLERMONT FERRAND 2,ETUD INTERACT SOLUTES SOLVANTS LAB,CNRS,UNITE 434,F-63170 AUBIERE,FRANCE

来源：

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1987年 / 65卷 / 11期

关键词：

Barium compounds - Entropy - Strontium compounds - Equilibrium constants - Gadolinium compounds - Positive ions - Solutions - Enthalpy - Lanthanum compounds;

D O I：

10.1139/v87-439

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The standard enthalpies of transfer of ribose and arabinose from water to aqueous solutions of electrolytes (CaCl2, SrCl2, BaCl2, LaCl3, and GdCl3) have been measured at 25°C. A method is described to calculate from these data the equilibrium constant and the enthalpy for the association between the cations and the complexing isomers of ribose. Mean values relative to these isomers are given: the constants vary from 2.0 to 4.3 and the enthalpies from -5.9 to - 17.9 kj mol-1 for the different cations studied. The thermodynamic properties of association are not related to the size nor to the charge of the complexed cation in a simple way. On the other hand, the enthalpies of reaction are linearly correlated to the entropies of reaction. Copyright © 2014 - Canadian Science Publishing.

引用

页码：2656 / 2660

页数：5

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