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Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) With 3,5-Dinitrocatechol and Monotetrazolium Cation

Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) With 3,5-Dinitrocatechol and Monotetrazolium Cation

Kirila Stojnova, Vidka Divarova, Petya Racheva, Kristina Bozhinova, Vanya Lekova

Acta Chim Slov. 2018 Mar;65(1):213-220.

PMID: 29562101

Abstract:

The equilibria of the chelate formation and ion-association in the liquid-liquid extraction system Mo(VI)‒3,5-DNC‒INT‒H2O‒CHCl3 were studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-associated complex formed between the anionic chelate of Mo(VI)‒3,5-dinitrocatechol (3,5-DNC) and the cation of 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (INT) were established. The validity of Beer's law was checked and some analytical characteristics were calculated. The effect of various co-existing ions and reagents on the process of complex formation was investigated. The molar ratio of the components in the ternary ion-associated complex Mo(VI)-3,5-DNC-INT was determined by independent methods. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP7659292	3,5-Dinitrocatechol		7659-29-2	Price

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