Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium
The kinetics of oxidation of 1,2-propanediol and 1,2,3-propanetriol by dihydroxyditelluratoargentate(III) (DDA) were studied spectrophotometrically between 298.2 K and 313.2 K in alkaline medium. The reaction rate showed first order dependence on DDA and 1 < nap < 2 order on the reductant. It...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2005-04-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/vol70/No4/JSCS_V70_No4-04.pdf |
| _version_ | 1828916181227012096 |
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| author | JIN-HUAN SHAN SHU-YING HUO SHI-GANG SHEN HAN-WEN SUN |
| author_facet | JIN-HUAN SHAN SHU-YING HUO SHI-GANG SHEN HAN-WEN SUN |
| author_sort | JIN-HUAN SHAN |
| collection | DOAJ |
| description | The kinetics of oxidation of 1,2-propanediol and 1,2,3-propanetriol by dihydroxyditelluratoargentate(III) (DDA) were studied spectrophotometrically between 298.2 K and 313.2 K in alkaline medium. The reaction rate showed first order dependence on DDA and 1 < nap < 2 order on the reductant. It was found that the pseudo-first order rate constant kobs increased with increasing concentration of OH- and decreasing concentration of TeO42-. There is a negative salt effect and no free radicals were detected. In view of this, the dihydroxymonotelluratoargentate(III) species is assumed to be the active species. A plausible mechanism involving a two-electron transfer is proposed and the rate equations derived from the mechanism can explain all the experimental results. The activation parameters, as well as the rate constants of the rate-determining step were calculated. |
| first_indexed | 2024-12-13T20:27:50Z |
| format | Article |
| id | doaj.art-afe5c96039f8433fa0d841b0e4e0befa |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-12-13T20:27:50Z |
| publishDate | 2005-04-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-afe5c96039f8433fa0d841b0e4e0befa2022-12-21T23:32:31ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392005-04-01704585592Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline mediumJIN-HUAN SHANSHU-YING HUOSHI-GANG SHENHAN-WEN SUNThe kinetics of oxidation of 1,2-propanediol and 1,2,3-propanetriol by dihydroxyditelluratoargentate(III) (DDA) were studied spectrophotometrically between 298.2 K and 313.2 K in alkaline medium. The reaction rate showed first order dependence on DDA and 1 < nap < 2 order on the reductant. It was found that the pseudo-first order rate constant kobs increased with increasing concentration of OH- and decreasing concentration of TeO42-. There is a negative salt effect and no free radicals were detected. In view of this, the dihydroxymonotelluratoargentate(III) species is assumed to be the active species. A plausible mechanism involving a two-electron transfer is proposed and the rate equations derived from the mechanism can explain all the experimental results. The activation parameters, as well as the rate constants of the rate-determining step were calculated.http://www.shd.org.yu/HtDocs/SHD/vol70/No4/JSCS_V70_No4-04.pdfdihydroxyditelluratoargentate(III)12-propanediol123-propanetriolredox reactionkinetics and mechanism |
| spellingShingle | JIN-HUAN SHAN SHU-YING HUO SHI-GANG SHEN HAN-WEN SUN Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium Journal of the Serbian Chemical Society dihydroxyditelluratoargentate(III) 1 2-propanediol 1 2 3-propanetriol redox reaction kinetics and mechanism |
| title | Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium |
| title_full | Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium |
| title_fullStr | Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium |
| title_full_unstemmed | Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium |
| title_short | Kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate(III) in alkaline medium |
| title_sort | kinetics and mechanism of the oxidation of polyhydric alcohols by dihydroxyditelluratoargentate iii in alkaline medium |
| topic | dihydroxyditelluratoargentate(III) 1 2-propanediol 1 2 3-propanetriol redox reaction kinetics and mechanism |
| url | http://www.shd.org.yu/HtDocs/SHD/vol70/No4/JSCS_V70_No4-04.pdf |
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