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2-гидрокси-5-хлортиофенол новый аналитческий реагент для экстракционно-фотометрического определения ванадия(IV) в нефти и почвах

2-гидрокси-5-хлортиофенол новый аналитческий реагент для экстракционно-фотометрического определения ванадия(IV) в нефти и почвах

Abstract

Vanadium(IV) complexing with 2-hydroxy-5-chlorothiophenol in the presence of aminophenols is spectrophotometrically investigated. Optimum conditions for formation and extraction of the complex are determined. It is found that mixed ligand complexes are formed at pH 3.2-5.1. The best extractants are chloroform and dichloroethane. Some physical and chemical characteristics of mixed-ligand complexes ate identified. The maximum in the absorption spectrum is observed at λ = 625ч635 nm. The molar absorption coefficient is equal to (3,56 ч 3,70) · 104. Coordinating ion is a doubly charged cation VO2+ 2. The molar ratio of components in the complex corresponds to V(IV) : GHTF : AF = 1 : 2 : 1.

Спектрофотометрическим методом исследовано комплексообразование ванадия(IV) с 2-гидрокси5-хлортиофенолом в присутствии аминофенолов. Определены оптимальные условия образования и экстракции комплекса. Установлено, что разнолигандные комплексы образуются при рН = 3,2 ч 5,1. Наилучшими экстрагентами являются хлороформ и дихлорэтан. Определены некоторые физикохимические характеристики разнолигандных комплексов. Максимум в спектре светопоглощения наблюдается при λ = 625 ч 635 нм. Молярный коэффициент светопоглощения равен (3,56 ч 3,70) · 104. Координирующим ионом является двухзарядный катион VO2+ 2. Молярное соотношение компонентов в комплексе соответствует V(IV) : ГХТФ : AФ = 1 : 2 : 1.

Keywords

ВАНАДИЙ, 2-ГИДРОКСИ-5-ХЛОРТИОФЕНОЛ, РАЗНОЛИГАНДНЫЕ КОМПЛЕКСЫ, ЭКСТРАКЦИОННО-ФОТОМЕТРИЧЕСКИЙ МЕТОД

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold