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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Thermal unimolecular elimination of water from tert-butyl alcohol: Deuterium kinetic isotope effects, transition structure, reaction path, and mechanism
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Thermal unimolecular elimination of water from tert-butyl alcohol: Deuterium kinetic isotope effects, transition structure, reaction path, and mechanism

机译:从叔丁醇中热单分子消除水:氘动力学同位素效应,过渡结构,反应路径和机理

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摘要

Thermal decomposition of (CH3)(2)C(OH)CD3 in a static reactor and in a shock tube reactor led to intramolecular symmetry-corrected k(H)/k(D) kinetic isotope effects for eliminations of HOH and HOD of 1.80 +/- 0.08 at 436 to 481 degreesC and 1.54 +/- 0.12 at 813 to 883 degreesC. Calculations with B3LYP/6-31G* theory defined the transition structure for the 1,2-elimination reaction, the internal reaction coordinate path, and k(H)/k(D) predictions. The reaction takes place through a four-centered transition structure approached through very different progressions of bond length changes along the reaction coordinate.
机译:(CH3)(2)C(OH)CD3在静态反应器和激波管反应器中的热分解导致分子内对称校正的k(H)/ k(D)动力学同位素效应,从而消除了1.80的HOH和HOD在436至481摄氏度下为+/- 0.08,在813至883摄氏度下为1.54 +/- 0.12。用B3LYP / 6-31G *理论进行的计算定义了1,2-消除反应的过渡结构,内部反应坐标路径以及k(H)/ k(D)预测。反应是通过四中心过渡结构发生的,该结构通过沿反应坐标的键长变化非常不同的进程来实现。

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