Open AccessSPECTROPHOTOMETRIC STUDY OF NICKEL (II) COMPLEXES WITH 2- HYDROXYTHIOLPHENOL AND ITS DERIVATIVES IN THE PRESENCE OF HYDROPHOBIC AMINES
Author(s) -
А. З. Залов,
AUTHOR_ID,
K. O. Iskenderova,
Z.G. Askerova,
A.B. Hajiyeva,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2021
Publication title -
kimya problemləri
Language(s) - English
Resource type - Journals
eISSN - 2522-1655
pISSN - 2221-8688
DOI - 10.32737/2221-8688-2021-4-224-231
Subject(s) - chloroform , nickel , chemistry , aniline , carbon tetrachloride , absorption (acoustics) , extraction (chemistry) , molar absorptivity , dimethylaniline , aniline compounds , 1,2 dichloroethane , ligand (biochemistry) , inorganic chemistry , nuclear chemistry , organic chemistry , catalysis , materials science , biochemistry , physics , receptor , optics , composite material
The complexation reactions of nickel (II) with 2-hydroxythiophenol and its derivatives (2,5- dihydroxythiophenol, 2-hydroxy-5-chlorothiophenol, 2-hydroxy-5-bromothiophenol, and 2-hydroxy-5- iodothiophenol) in the presence of hydrophobic amines were studied by spectrophotometric methods. Aniline and N, N-dimethylaniline were used as hydrophobic amines. It found that mixed-ligand complexes (MLC) are formed in a weakly acidic medium (pH 2.3-8.0). The maximum in the light absorption spectrum of the complexes is observed at λ = 620-650 nm. The molar coefficients of light absorption are (4.1-4.3)×104 . The best extractants were chloroform, dichloroethane and carbon tetrachloride. With a single extraction with chloroform, 97.8-98.4% of nickel is extracted in the form of MLC. Based on the data obtained, photometric methods for the determination of nickel in various objects were developed.