Loss of Cl from CHCl₃⁺ with little excess energy is found to proceed via two distinct pathways, the reaction channel which is being followed is determined by a symmetry-induced kinetic isotope effect. Computational investigations suggest competition between a statistical adiabatic process and a process of electronic predissociation. For CHCl₄⁻ and CH₂Cl₃⁻, rotational predissociation contributes to the kinetic isotope effects for all isotopomers, whereas the particularly large effect observed for CH³⁵Cl₃³⁷Cl⁻ also originates from symmetry-induced degeneracy of vibrational modes in the C_3V point.

中文翻译：

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对称诱导的动力学同位素效应在CHCl的解离动力学₃ ⁺和CHCl ₄ ^-

发现CHCl ₃ ⁺中Cl的损失几乎没有多余的能量，这是通过两个不同的途径进行的，随后的反应通道是由对称诱导的动力学同位素效应决定的。计算研究表明，统计绝热过程和电子预分解过程之间存在竞争。对于三氯甲烷₄ ^-和CH ₂氯₃ ^- ，旋转预离解有助于对所有同位素的动力学同位素效应，而对于CH观察到的效果特别大³⁵氯₃ ³⁷氯^-也从在C振动模式的对称性引起的简并性起源_3V点。