Influence of the composition of water-acetonitrile and water-methanol mixtures on the stability of complexes Na and K with 18-crown-6 ether

Eltsov S.V.; Kabakova E.N.; Bondarev N.V.

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Influence of the composition of water-acetonitrile and water-methanol mixtures on the stability of complexes Na and K with 18-crown-6 ether

机译：水-乙腈和水-甲醇混合物的组成对18-冠-6醚配合物Na和K稳定性的影响

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The variations of Gibbs free energies (ΔΔG) of Na~+ and K~+ ions complexation with 18-crown-6 while transferring from water to mixed solvents are evaluated by using the values of stability constants in 20, 40, 60, 80, and 100 wt /100 of CH_3CN and CH_3OH. The individual contributions of ΔG of ligand, metal ions and complexes transfer into the ΔΔG values are determined. It has been shown, that the stability increase of complexes in mixed solvents as compared with aqueous media is caused by decrease of solvation energy of the ligand, metal ions and increase of energy of the complex solvation.

机译：使用从20到40、60、80，和100 wt / 100的CH_3CN和CH_3OH。确定了配体，金属离子和络合物转移到ΔG值中的ΔG的各个贡献。已经表明，与水性介质相比，在混合溶剂中配合物的稳定性增加是由于配体，金属离子的溶剂化能的降低以及配合物溶剂的能的增加引起的。

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《Украинский химический журнал》 |1998年第4期|p.84-88|共5页
作者
Eltsov S.V.; Kabakova E.N.; Bondarev N.V.;
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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 rus
中图分类化学;
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Influence of the composition of water-acetonitrile and water-methanol mixtures on the stability of complexes Na and K with 18-crown-6 ether

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