Chemistry Research and Practice

Spectroscopic Study of Complex Formation of Cobalt (Ii) with 2,6-Mercapto-4-Sec-Butylphenol and Heterocyclic Amines

Abstract

Kerim A Kuliyev*, Ali Z Zalov and Naiba N Efendiyeva

Mixed-ligand complexes of cobalt (II) with 2,6-dimercapto-4-sec-butylphenol (DMSBF) in the presence of heterocyclic amines
(Am) were studied by spectroscopy methods. Dipyridyl, phenanthroline, and bathophenanthroline were used from the
heterocyclic amines. Various factors such as the volume of ligand used, the pH of the solution, the stability of the complex over
time and the interference of other metals that affect the formation of the complex have been studied in detail. Extraction of
mixed ligand complexes is maximal at pH 5.2-7.9. The optimal conditions for the formation and extraction of mixed-ligand
compounds have been found and the ratios of components I the complexes have been determined. The Beer’s law was applicable
in the range of 0.4-18 μg/ml. The effect of foreign ions and reagents on the extraction was studied. The method is free from
common interferences. A procedure has been developed for extraction – spectrophotometric determination cobalt in different
objects (in steel, sewage water, bottom sediments, food and soil samples).

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