INVESTIGATION OF THE CHEMISTRY OF COMPLEXATION OF ZINC IONS WITH M-CRESOLPHTHALEXON S

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DOI: https://doi.org/None
Issue: 
4
Year: 
2015

M.A. Karibyants (1), PhD; M.V. Mazhitova (2), PhD; Professor E.I. Kondratenko (1), PhD; N.A. Lomteva (1), PhD; E.N. Kinzhieva (1) 1 -Astrakhan State University; 20a, Tatishchev St., Astrakhan 414056 2 -Astrakhan State Medical Academy; 121, Bakinskaya St., Astrakhan 414024

The interaction of zinc ions with m-cresolphthalexon S, one of the triphenylmethane dyes, has been investigated. The two complex compounds have been identified, which differ in their existence domain, light absorption spectra, a ratio of reaction components, and other characteristics; they also exist at different pH values of 5 and 7. The formation of Complex I is accompanied by a bathochromic effect and that of Complex II is attended by a hypsochromic effect. The causes of the observed color reactions are discussed. The investigators have established the simplest metal/reactant ratios, molar light absorption coefficients, and stability constants of the complex compounds zinc and m-cresolphthalexon S. The composition of the complexes has been established by stoichiometric point, molar ratio, and isomolar series methods. The chemistry of the formation of Complex I has been determined using the graphical design method; a diagram of its formation is given.
Keywords: 
complexation
spectrophotometry
zinc
m-cresolphthalexon S
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