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.
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页码：1569 / 1576
页数：8
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