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Potentiometric study of equilibrium constants of a novel triazine--thione derivative and its stability constants with Hg2+, Cu2+, Ni2+, Pb2+, and Zn2+ metal ions in ethanol and water mixed
2013
Journal:  
Turkish Journal of Chemistry
Author:  
DOI:  
10.3906/kim-1207-55
Abstract:

The deprotonation constants of 5-hydroxy-5,6-di-pyridin-2-yl-4,5-dihydro-2H-[1,2,4] triazine-3-thione (HPT) and the stability constants of its Hg2+, Ni2+, Cu2+, Pb2+, and Zn2+ ion complexes were studied in 20% ethanol and water mixed at 25 \pm 0.1 °C and ionic strength (I) of 0.1 M supported by NaCl. Four pKa values of HPT were determined: 3.58, 6.30, 9.23, and 9.69. In various pH conditions, the different complex forms were formulated as ML, MHL, MH2L, MH3L, MH4L, and MH-2L between Hg2+, Ni2+, Cu2+, Pb2+, and Zn2+ ions and HPT. According to the potentiometric and spectrophotometric results, the HPT and Hg2+ combination formed a selective and highly stable complex at pH 7.

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Turkish Journal of Chemistry

Field :   Fen Bilimleri ve Matematik

Journal Type :   Uluslararası

Metrics
Article : 2.410
Cite : 1.692
2023 Impact : 0.068
Details
Turkish Journal of Chemistry