Study on the Equilibria of Chelate Formation and the Ion-association of Anionic Chelate of Germanium(IV) with 4-Nitrocatechol and 2-(4-Iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium Cation

被引：5
|
作者：
Stojnova, K. T. [1 ]
Lekova, V. D. [1 ]
机构：
[1] Plovdiv Univ Paisii Hilendarski, Plovdiv 4000, Bulgaria
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2019年 / 64卷 / 10期
关键词：
germanium(IV); ion-associated chelate; extraction equilibriums; UV-Vis spectroscopy; COMPLEX-FORMATION; SPECTROPHOTOMETRIC METHOD; EXTRACTION; LIQUID; LIGANDS; FORM;
D O I：
10.1134/S0036023619100152
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The complex formation and the ion-association of the ion-pair formed between the anionic chelate of molybdenum(VI)-3,5-dinitrocatechol (3,5-DNC) with the cation of 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) in the liquid-liquid extraction system Mo(VI)-3,5-DNC-MTT-H2O-CHCl3 was studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-associated complex Mo(VI)-3,5-DNC-MTT were established. The molar ratio of the components in the ion-associated complex Mo(VI)-3,5-DNC-MTT was determined by independent methods. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structural formula of the complex were suggested.
引用
收藏
页码：1235 / 1241
页数：7
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