Frenette Mathieu, Aliaga Carolina, Font-Sanchis Enrique, Scaiano J C
Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada.
Org Lett. 2004 Jul 22;6(15):2579-82. doi: 10.1021/ol049111j.
[reaction: see text] The temperature dependence of the dissociation of dimers formed from highly stabilized carbon-centered radicals has been examined. Analysis of the data yields the bond dissociation energy (BDE) for the central head-to-head C-C bond in these compounds. For example, for the dimer derived from 3-phenyl-2-coumaranone, BDE is 23.6 kcal/mol and the C-C bond length 1.596 A, a rather long value for a sigma bond.
[反应：见原文] 已对由高度稳定的碳中心自由基形成的二聚体的解离温度依赖性进行了研究。对数据的分析得出了这些化合物中中心头对头C-C键的键解离能（BDE）。例如，对于由3-苯基-2-香豆酮衍生的二聚体，BDE为23.6千卡/摩尔，C-C键长为1.596埃，对于一个σ键来说，这是一个相当长的值。
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