Generation and Reactivity toward Oxygen of Carbon-Centered Radicals Containing Indane, Indene, and Fluorenyl Moieties
作者:Enrique Font-Sanchis、Carolina Aliaga、Elena V. Bejan、Raecca Cornejo、J. C. Scaiano
DOI:10.1021/jo026666o
日期:2003.4.1
than steric effects in determining the low radical reactivity with oxygen. Scavenging by the nitroxide TEMPO was also examined, and revealed that in this case steric effects are more important than in the case of oxygen. The rate constants for the hydrogen abstraction by cumyloxyl and tert-butoxyl radicalsgenerated thermally and photochemically have been determined in benzene, and were in the range
Bond Dissociation Energies for Radical Dimers Derived from Highly Stabilized Carbon-Centered Radicals
作者:Mathieu Frenette、Carolina Aliaga、Enrique Font-Sanchis、J. C. Scaiano
DOI:10.1021/ol049111j
日期:2004.7.1
[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