article
Liquid-liquid extraction-chromogenic systems containing tungsten (VI), 2-Hydroxy-5-Chlorothiophenol and Diphenylguanidine
International Journal of Chemical Studies · 2016 · Vol. 4(3) · pp. 07–12
Abstract
The complexation of tungsten (VI) with 2-hydroxy-5-chlorothiophenol in the presence of diphenylguanidine is studied by spectrophotometry. Optimal conditions for the formation and extraction of the complex are determined. It is found that a mixed-ligand complex is formed at pH 5–6. Chloroform and dichloroethane are the best extractants. Some physicochemical characteristics of the mixed-ligand complex are determined; the molar absorption coefficient at 480 nm is 5.6 × 104. The molar ratio of components in the complex is 1: 2: 2.
Chemical Thermodynamics and Molecular StructureChloroformChromogenicChemistryExtraction (chemistry)TungstenSpectrophotometryMolarLigand (biochemistry)Molar ratioNuclear chemistry
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