UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS

Using UV spectroscopy the dissociation constants of previously synthesized 4,5-disupstituted-1,2,4-triazoline-3-thiones are determinate. The UV spectra were recorded in aqueous sodium hydroxide solutions at different pH values in the range from 190 to 360 nm, immediately after preparation of the sus...

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Autores principales:	DIMOVA,VESNA, JORDANOV,IGOR, DIMITROV,LAZO
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2016
Materias:	Dissociation constants CVA method 1,2,4-triazoline-3-thiones UV
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000300013
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spelling	oai:scielo:S0717-970720160003000132017-06-14UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONSDIMOVA,VESNAJORDANOV,IGORDIMITROV,LAZO Dissociation constants CVA method 1,2,4-triazoline-3-thiones UV Using UV spectroscopy the dissociation constants of previously synthesized 4,5-disupstituted-1,2,4-triazoline-3-thiones are determinate. The UV spectra were recorded in aqueous sodium hydroxide solutions at different pH values in the range from 190 to 360 nm, immediately after preparation of the suspension. The pK TH values were obtained experimentally, graphically and by the Characteristic Vector Analysis method. Results show that the investigated compounds have two dissociation processes. The first process belongs to the dissociation of SH proton, while the second dissociation process is dissociation of OH proton.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.61 n.3 20162016-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000300013en10.4067/S0717-97072016000300013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dissociation constants CVA method 1,2,4-triazoline-3-thiones UV
spellingShingle	Dissociation constants CVA method 1,2,4-triazoline-3-thiones UV DIMOVA,VESNA JORDANOV,IGOR DIMITROV,LAZO UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
description	Using UV spectroscopy the dissociation constants of previously synthesized 4,5-disupstituted-1,2,4-triazoline-3-thiones are determinate. The UV spectra were recorded in aqueous sodium hydroxide solutions at different pH values in the range from 190 to 360 nm, immediately after preparation of the suspension. The pK TH values were obtained experimentally, graphically and by the Characteristic Vector Analysis method. Results show that the investigated compounds have two dissociation processes. The first process belongs to the dissociation of SH proton, while the second dissociation process is dissociation of OH proton.
author	DIMOVA,VESNA JORDANOV,IGOR DIMITROV,LAZO
author_facet	DIMOVA,VESNA JORDANOV,IGOR DIMITROV,LAZO
author_sort	DIMOVA,VESNA
title	UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
title_short	UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
title_full	UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
title_fullStr	UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
title_full_unstemmed	UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS
title_sort	uv spectrophotometric determination of pk's of 1,2,4-triazoline-3-thiones in sodium hydroxide solutions
publisher	Sociedad Chilena de Química
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072016000300013
work_keys_str_mv	AT dimovavesna uvspectrophotometricdeterminationofpksof124triazoline3thionesinsodiumhydroxidesolutions AT jordanovigor uvspectrophotometricdeterminationofpksof124triazoline3thionesinsodiumhydroxidesolutions AT dimitrovlazo uvspectrophotometricdeterminationofpksof124triazoline3thionesinsodiumhydroxidesolutions
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UV SPECTROPHOTOMETRIC DETERMINATION OF pK's OF 1,2,4-TRIAZOLINE-3-THIONES IN SODIUM HYDROXIDE SOLUTIONS

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