Use of Kinetic Isotope Effects in Mechanism Studies. 5. Isotope Effects and Element Effects Associated with Hydron-Transfer Steps during Alkoxide-Promoted Dehydrohalogenations

Heinz F. Koch; Gerrit Lodder; Judith G. Koch

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Use of Kinetic Isotope Effects in Mechanism Studies. 5. Isotope Effects and Element Effects Associated with Hydron-Transfer Steps during Alkoxide-Promoted Dehydrohalogenations

机译：动力学同位素效应在机理研究中的应用。 5.烷氧基促进的脱卤化氢过程中与氢转移步骤相关的同位素效应和元素效应

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The Arrhenius behavior of the primary kinetic isotope effect, (k~H/k~d)_Obs and (k~H/k~T)_Obs, associated with the methanolic sodium methoxide- promoted dehydrohalogenations of m-ClC_6H_4C~iHClCH_2Cl (I), m-CF_3C_6H_4C~I- HClCH_2Cl(II) and p-CF_3C_6H_4C~iHClCH_2F(III) has been used to calculate the internal-return parameters, a=k_1/ K_Elim~X, in a two-step mechanism featuring a hydrogen-bonded carbainion.

机译：主要动力学同位素效应（k〜H / k〜d）_Obs和（k〜H / k〜T）_Obs的Arrhenius行为与甲醇-甲醇钠促进的m-ClC_6H_4C〜iHClCH_2Cl的脱卤化氢有关（I），m-CF_3C_6H_4C〜I- HClCH_2Cl（II）和p-CF_3C_6H_4C〜iHClCH_2F（III）已用于通过氢键结合的两步机制计算内部返回参数a = k_1 / K_Elim〜X碳负离子。

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《Journal of the American Chemical Society》 |1997年第42期|p.9965-9974|共10页
作者
Heinz F. Koch; Gerrit Lodder; Judith G. Koch;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类化学;
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Use of Kinetic Isotope Effects in Mechanism Studies. 5. Isotope Effects and Element Effects Associated with Hydron-Transfer Steps during Alkoxide-Promoted Dehydrohalogenations

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