116916-09-7Relevant articles and documents
Remote steric effects on the disproportionation / recombination ratio of cumyl radicals
Kopecky, Karl R.,Yeung, Mei-Yuk
, p. 374 - 376 (2007/10/02)
The disproportionation / combination ratio in the reaction between two 3,5-di-tert-butylcumyl radicals, generated by thermolysis of the corresponding diazene, is 0.21 +/- 0.03 at 60 deg C in benzene.This is much larger than the value of 0.06 found for the unsubstituted cumyl radicals.It is suggested that the tert-butyl groups hinder the formation of a parallel association complex, which has been proposed to account for the much smaller amount of disproportionation in the reaction between benzylic radicals as compared with alkyl radicals.