| 分光光度法研究二过碲酸合铜(Ⅲ)氧化四氢糠醇的动力学 |
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| 引用本文： | 单金缓,申世刚,郄录江,宋咏梅.分光光度法研究二过碲酸合铜(Ⅲ)氧化四氢糠醇的动力学[J].河北大学学报(自然科学版),1997(4). |
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| 作者姓名： | 单金缓 申世刚 郄录江 宋咏梅 |
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| 作者单位： | Department of Chemistry，Hebei University，Baoding 071002 |
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| 摘 要： | 采用分光光度法研究了碱性介质中二过碲酸合铜（Ⅲ）配离子氧化四氢糠醇的动力学及机理。实验结果表明，反应对［Ｃｕ（Ⅲ）］是一级，对四氢糠醇为１．２７～１．４９级（２９４．２～３０２．２Ｋ）。表观速率常数随体系中［ＯＨ－］的增大而降低，随碲酸根浓度的增加而降低。根据实验事实，提出了一种含有前期平衡的反应机理，据此导出了一个能够解释实验事实的速率方程，求得了速控步的速率常数，并给出了２９８．２Ｋ时的活化参数。
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| 关 键 词： | 二过碲酸合铜（Ⅲ） 四氢糠醇 氧化反应 动力学和机理 |
Kinetics and Mechanism of Oxidation of Tetrahydrofurfuryl Alcohol by Ditelluratocuprate( Ⅲ) Ion in Alkaline Medium |
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| Shan Jinhuan,Shen Shigang,Qie Lujiang,Song Yongmei.Kinetics and Mechanism of Oxidation of Tetrahydrofurfuryl Alcohol by Ditelluratocuprate( Ⅲ) Ion in Alkaline Medium[J].Journal of Hebei University (Natural Science Edition),1997(4). |
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| Authors: | Shan Jinhuan Shen Shigang Qie Lujiang Song Yongmei |
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| Abstract: | The kinetics of oxidation of tetrahydrofurfuryl alcohol by ditelluratocuprate( Ⅲ) complex ion has been studied by spectrophotometry in alkaline medium. The order in Cu( Ⅲ) was found to be unity and that in tetrahydrofurfuryl alcohol to be from 1.27 to 1.49 at 294.2～302.2 K. The rate decreases with increase in OH - ] and decreases with increase in TeO 2- 4 ]. A mechanism involving preequilibriums has been proposed. All the experimental phenomena can be explained by the equations derived from the mechanism. The activation parameters of the rate determining step have been calculated. |
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| Keywords: | Ditelluratocuprate( Ⅲ) Tetrahydrofurfuryl alcohol Oxidation Kinetics and mechanism |
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