Kinetics and Mechanism of the Chlorine Dioxide-Tetrathionate Reaction

Attila K. Horvath; Istvan Nagypal; Irving R. Epstein

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Kinetics and Mechanism of the Chlorine Dioxide-Tetrathionate Reaction

机译：二氧化氯-四硫代硫酸盐反应的动力学和机理

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The chlorine-dioxide-tetrathionate reaction was studied spectrophotometrically in the pH range 4.55-5.55 at 25.0 ± 0.2 ℃ and 0.5 M ionic strength adjusted with sodium acetate as a buffer component. The stoichiometry was found to be S_4O_6~(2-) + 4·ClO_2 + 5H_2O → 4SO_4~(2-) + ClO_3~- + 3Cl~- + 10H~+ with small deviations at high excess of chlorine dioxide with no chloride ion initially present. The initial presence of chloride not only affects the stoichiometry but also accelerates the reaction. A 14-step mechanism, including four known and two newly proposed intermediates,is suggested to describe the observed behavior of the system.

机译：在25.0±0.2℃的pH范围为4.55-5.55的条件下，用分光光度法研究了二氧化氯-四硫酸盐的反应，并用乙酸钠作为缓冲液组分调节了0.5 M的离子强度。发现化学计量为S_4O_6〜（2-）+ 4·ClO_2 + 5H_2O→4SO_4〜（2-）+ ClO_3〜-+ 3Cl〜-+ 10H〜+，在二氧化氯过量过量且无氯离子的情况下，偏差很小。最初存在。氯化物的最初存在不仅影响化学计量，而且还加速了反应。建议使用14个步骤的机制来描述所观察到的系统行为，其中包括四个已知的中间体和两个新提出的中间体。

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《The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory》 |2003年第47期|共6页
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Attila K. Horvath; Istvan Nagypal; Irving R. Epstein;
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中图分类物理化学（理论化学）、化学物理学;
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1. Kinetics and Mechanism of the Chlorine Dioxide-Tetrathionate Reaction [J] . Attila K. Horvath, Istvan Nagypal, Irving R. Epstein The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory . 2003,第47期

机译：二氧化氯-四硫代硫酸盐反应的动力学和机理
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Kinetics and Mechanism of the Chlorine Dioxide-Tetrathionate Reaction

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