The thermodynamic characteristics of complex formation in the zinc(II) ion-threonine system in aqueous solution

被引：1

作者：

Kochergina, L. A. ^{[1
]}

Ratkova, E. L. ^{[1
]}

Gorboletova, G. G. ^{[1
]}

机构：

[1] Ivanovo State Univ Chem Technol, Ivanovo, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2007年 / 81卷 / 04期

关键词：

D O I：

10.1134/S0036024407040085

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The heat effects of complex formation between D, L-threonine and zinc(II) ions at 288.15, 298.15, and 308.15 K and ionic strengths of 0.25, 0.50, and 0.75 were determined calorimetrically against the background of potassium nitrate. The thermochemical results were processed taking step equilibria into account. Along with complex formation, side protolytic processes were considered. The standard heat effects of complex formation in the system studied were determined by extrapolation to zero ionic strength with the use of an equation with one individual parameter. The heats of solution of D, L-threonine in water and aqueous alkali were used to calculate the standard enthalpies of formation of the complexes.

引用

页码：549 / 555

页数：7

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