Effect of the Composition of a Water-Dimethyl Sulfoxide Solvent on the Stability of Nickel(II)-Cryptand[2.2.2] Complexes

被引：0

作者：

Isaeva, V. A. ^{[1
]}

Katolikova, A. S. ^{[1
]}

Pogodina, E. I. ^{[1
]}

Kuranova, N. N. ^{[1
]}

机构：

[1] Ivanovo State Univ Chem & Technol, Ivanovo 153000, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2024年 / 98卷 / 08期

关键词：

cryptand[2.2.2; nickel(II); constant of stability; water-dimethyl sulfoxide solvent; GIBBS ENERGIES; IONS; THERMODYNAMICS; SOLVATION; CONSTANTS; AMMONIUM; SOLUBILITY; MIXTURES; CATIONS; ANIONS;

D O I：

10.1134/S0036024424700687

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：

Constants of stability of nickel(II)-cryptand[2.2.2] complexes in aqueous dimethyl sulfoxide solutions with variable contents of the organic cosolvent are determined via potentiometric titration at T = 298 K. It is found that the stability of mononuclear nickel(II) cryptate falls as that of the binuclear complex rises along with the concentration of dimethyl sulfoxide in a solution. An increase in the stability of protonated nickel(II) cryptate is also observed in the region of high dimethyl sulfoxide concentrations. The Gibbs energies of transferring nickel(II) ions from water to a water-dimethyl sulfoxide solvent are calculated using literature data. The contributions from the resolvation of the reactants in water-dimethyl sulfoxide mixtures to the change in the stability of nickel(II)-cryptand[2.2.2] complexes are determined.

引用

页码：1648 / 1655

页数：8

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