Activation energies for the 1,2-carbon migration of ring-fused cyclopropylchlorocarbenes
作者:Gaosheng Chu、Robert A. Moss、Ronald R. Sauers、Robert S. Sheridan、Peter S. Zuev
DOI:10.1016/j.tetlet.2005.03.209
日期:2005.6
Fused-ring cyclopropylchlorocarbenes 2 and 3 ring expand to fused-ring chlorocyclobutenes 10 and 11, respectively, with activation energies of 3–4 kcal/mol and activation entropies of ∼−20 e.u. Carbon tunneling appears to be unimportant at low temperatures.
稠环环丙基氯卡宾2和3的环分别扩展为稠环氯环丁烯10和11,其活化能为3-4 kcal / mol,活化熵为-20 eu。在低温下碳隧穿似乎并不重要。