Thermodynamics of Mixed-Ligand Nickel(II) Complex Formation with Ornithine and Histidine in Aqueous Solutions

被引：2

作者：

Nikitina, M. G. ^{[1
]}

Pyreu, D. F. ^{[1
]}

机构：

[1] Ivanovo State Univ, Ivanovo 153025, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2021年 / 66卷 / 10期

关键词：

mixed-ligand complex formation; histidine; ornithine; calorimetry; denticity; AMINO-ACIDS; METAL-COMPLEXES; PLATINUM(IV) COMPLEXES; STABILITY-CONSTANTS; COPPER(II); NI(II); IONS;

D O I：

10.1134/S0036023621100120

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The formation of various mixed-ligand complexes in the Ni(II)-L-histidine (His)-L-ornithine (Orn) system was studied by potentiometric titration, calorimetry, and spectrophotometry. The thermodynamic parameters (logK, Delta(r)G(0), Delta H-r, and Delta S-r) of complex formation reactions at 298.15 K and ionic strength I = 0.5 (KNO3) were determined. A comparative analysis of the thermodynamic parameters served as the basis to suggest the most likely coordination mode of amino acid moieties in mixed-ligand complexes.

引用

页码：1569 / 1576

页数：8

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