The gas phase thermal chemistry of several halocyclopropenes has been investigated. In each instance the cyclopropene was converted cleanly to an allene.
Kinetic Studies of the Cyclization of Singlet Vinylchlorocarbenes
作者:Robert A. Moss、Jingzhi Tian、Ronald R. Sauers、Robert S. Sheridan、Avinash Bhakta、Peter S. Zuev
DOI:10.1021/ol051743y
日期:2005.10.1
[reaction: see text] Vinylchlorocarbenes (R = Me or Cl) cyclize to cyclopropenes with k = (2.4-5.1) x 10(7) s(-1) or (3.1-4.5) x 10(6) s(-1), respectively, in solution at room temperature. The corresponding E(a) values are 6.6 and 5.7 kcal/mol. Excited diazirines are also likely precursors of the cyclopropenes.
The gas phase thermal chemistry of several halocyclopropenes has been investigated. In each instance the cyclopropene was converted cleanly to an allene.
Chlorocyclopropenes, chlorocyclopropenyl cations, and cyclopropenone