Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures

Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures

The stability constant, Kf, for the complexation of copper(II) ion with 4-amino-3-ethyl-1,2,4-triazol-5-thione (AETT ) in 0, 20, 40, 60 and 80 (v/v) % ethanol-water mixtures were determined conductometrically at different tempratures. Stability constant of resulting 1:1 complexes were being larger b...

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Main Authors: Mohammad Hakimi, Azizollah Nezhadali, Asghar Naemi
Format: Article
Language:English
Published: Hindawi Limited 2008-01-01
Series:E-Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2008/364510
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spelling doaj-ad18ebfad1ee4e629c07062da9864b412020-11-24T23:10:20ZengHindawi LimitedE-Journal of Chemistry0973-49452090-98102008-01-015355155610.1155/2008/364510Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water MixturesMohammad Hakimi0Azizollah Nezhadali1Asghar Naemi2Department of Chemistry, Payame Noor University (PNU), Fariman, IranDepartment of Chemistry, Payame Noor University (PNU), Fariman, IranDepartment of Chemistry, Payame Noor University (PNU), Mashhad, IranThe stability constant, Kf, for the complexation of copper(II) ion with 4-amino-3-ethyl-1,2,4-triazol-5-thione (AETT ) in 0, 20, 40, 60 and 80 (v/v) % ethanol-water mixtures were determined conductometrically at different tempratures. Stability constant of resulting 1:1 complexes were being larger by increasing of temprature and ethanol percent. Stability constants of complexes vary inversly with dielectric constant of solvents. The enthalpy and entropy of complexation were determined from the temprature dependence of the formation constant. In all cases, the complexation were found to be enthalpy unstablized but entropy stablized. ࢞G0 of the studied complexes were evaluated at 25°C using thermodynamic relations, the negative values of ࢞G0 means that the complexation process is spantaneously.http://dx.doi.org/10.1155/2008/364510
collection DOAJ
language English
format Article
sources DOAJ
author Mohammad Hakimi
Azizollah Nezhadali
Asghar Naemi
spellingShingle Mohammad Hakimi
Azizollah Nezhadali
Asghar Naemi
Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
E-Journal of Chemistry
author_facet Mohammad Hakimi
Azizollah Nezhadali
Asghar Naemi
author_sort Mohammad Hakimi
title Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
title_short Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
title_full Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
title_fullStr Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
title_full_unstemmed Conductometric Study of Complex Formation Between Cu(II) Ion and 4-Amino-3-ethyl-1,2,4-triazol-5-thione in Binary Ethanol / Water Mixtures
title_sort conductometric study of complex formation between cu(ii) ion and 4-amino-3-ethyl-1,2,4-triazol-5-thione in binary ethanol / water mixtures
publisher Hindawi Limited
series E-Journal of Chemistry
issn 0973-4945
2090-9810
publishDate 2008-01-01
description The stability constant, Kf, for the complexation of copper(II) ion with 4-amino-3-ethyl-1,2,4-triazol-5-thione (AETT ) in 0, 20, 40, 60 and 80 (v/v) % ethanol-water mixtures were determined conductometrically at different tempratures. Stability constant of resulting 1:1 complexes were being larger by increasing of temprature and ethanol percent. Stability constants of complexes vary inversly with dielectric constant of solvents. The enthalpy and entropy of complexation were determined from the temprature dependence of the formation constant. In all cases, the complexation were found to be enthalpy unstablized but entropy stablized. ࢞G0 of the studied complexes were evaluated at 25°C using thermodynamic relations, the negative values of ࢞G0 means that the complexation process is spantaneously.
url http://dx.doi.org/10.1155/2008/364510
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AT azizollahnezhadali conductometricstudyofcomplexformationbetweencuiiionand4amino3ethyl124triazol5thioneinbinaryethanolwatermixtures
AT asgharnaemi conductometricstudyofcomplexformationbetweencuiiionand4amino3ethyl124triazol5thioneinbinaryethanolwatermixtures
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