Fatih POLAT, Hasan ATABEY, Hayati SARI, Alaaddin ÇUKUROVALI

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

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.

Anahtar Kelimeler:

Potentiometry, triazine--thione, equilibrium constants, proton affinity

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

Keywords:

Potentiometry, triazine--thione, equilibrium constants, proton affinity,

PDF

___

Aranzazu Blanco, M.; Lopez-Tores, E.; Mendiola, M. A.; Brunet, E.; Sevilla, M. T. Tetrahedron 2002, 58, 1525– 15
West, D. X.; Liberta, E.; Padhye, S. B.; Chikate, R. C.; Sonawane, P. B.; Kumbar, A. S.; Yeranda, R. S. Coordin. Chem. Rev. 1993, 123, 49–71.
Bain, G. A.; West, D. X.; Krejccia, J.; Martinez, J. V.; Ortega, S. H.; Toscano, R. A. Polyhedron 1997, 16, 855–862. Al-Soud, Y. A.; Al-Dweri, M. N.; Al-Masoudi, N. A. Il Farmaco 2004, 59, 775–783.
Ruiperez, J.; Mendiola, M. A.; Sevilla, M. T.; Procopio, J. R.; Hernandez, L. Electroanal. 2002, 14, 532–539.
Kataky, R.; Knell, M. A. J. Solution Chem. 2009, 38, 1483–1492.
Costa, J.; Delgado, R.; Drew, M. G. B.; Felix, V. J. Chem. Soc. 1998, 94, 1063–1072.
Li, Z. H.; Loh, Z. H.; Fong, S. W. A.; Yan, Y. K.; Henderson, W.; Mok, K. F.; Hor, T. S. A. J. Chem. Soc., Dalton Trans. 2000, 7, 1027–1031.
Drazic, B.; Popovic, G.; Jelic, R.; Sladic, D.; Mitic, D.; Andelkovic, Z.; Tesic, K. J. Serb. Chem. Soc. 2009, 74, 269–277.
Cukurovali, A. Synthetic Commun. 2009, 39, 4396–4406.
Gans, P.; Sabatini, A.; Vacca, A.; SUPERQUAD, J. Chem. Soc., Dalton Trans. 1985, 6, 1195–1200.
Buck, R. P.; Rondinini, S.; Covington, A. K.; Baucke, F. G. K.; Brett, C. M. A.; Camoes, M. F.; Milton, M. J. T.; Mussini, T.; Naumann, R.; Pratt, K. W.; Spitzer, P.; Wilson, G. S. Pure Appl. Chem. 74, 2169–2200.
Pettit, L. D. Academic Software, Otley, UK, 1992.
Jeﬀery, G. H.; Bassett, J.; Mendham, J.; Denney, R. C. Vogel’s Textbook of Quantitative Chemical Analysis, 5th ed.; Longman: London, 1989.
Altun, Y.; K¨ oseo˘ glu, F.; Demirelli, H.; Yılmaz, ˙I.; Cukurovali, A.; Kavak, N. J. Braz. Chem. Soc. 2009, 20, 299–308. Escobar-Valderrema, J.; Garcia-Tapia, J.; Ramirez-Ortiz, J.; Rosales, M.; Toscano, R.; Valdes-Martines, J. Can. J. Chem. 1989, 67, 198–201.
Cassas, J. S.; Castineiras, A.; Rodriguez-Arguelles, M. C.; Sanchez, A.; Sordo, J.; Vazquez-Lopez, A.; VazquezLopez, E. M. J. Chem. Soc., Dalton Trans. 2000, 14, 2267–2277.
Cassas, J. S.; Tasende, M. S.; Sordo, J. Coord. Chem. Rev. 2000, 209, 197–261.
Lopez-Torres, E.; Mendiola, M. A. Polyhedron 2005, 24, 1435–1444.
Schwarzenbach, G. Helv. Chem. Acta 1952, 35, 2344–2359.
Gopalakrishna Bhat, N.; Narayana, B. Syn. React. Inorg. Met.-Org. Chem. 2005, 35, 253–262.
Sillen, L. G.; Martell, A. E. Stability Constants of Metal Ion Complexes. Chem. Soc., Special Publication, No.17, London, 1964.
Diehl, H. Chem. Rev. 1937, 21, 39–111.
Sari, H.; Can, M.; Macit, M. Acta Chim. Slov. 2005, 52, 317–322.
Atabey, H.; Sari, H.; Al-Obaidi, F. N. J. Sol. Chem. 2012, 41, 793–803.
Lopez-Torres, E.; Mendiola, M. A.; Pastor, C. J. Polyhedron, 2006, 25, 1464–1470.
Burgess, J. Metal Ion in Solution, Ellis Horwood Limited, John Wiley & Sons: Chichester, UK, 1978.
Al-Obaidi, F. N.; Sari, H.; Macit, M. J. Chem. Eng. Data 2010, 55, 5576–5580.
Aksuner, N.; Basaran, B.; Henden, E.; Yılmaz, I.; Cukukurovali, A. Dyes Pigments 2009, 83, 211–217.