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The kinetics of radiation-induced hydrogen abstraction by CCl3 radicals in the liquid phase: Cyclohexene

✍ Scribed by Zeev B. Alfassi; Liviu Feldman

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
487 KB
Volume
13
Category
Article
ISSN
0538-8066

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✦ Synopsis

The kinetics of hydrogen abstraction from cyclohexene by CCI:1 radicals were studied in ('('I4 solution as a function of cyclohexene concentration and temperature in the range of 26-140OC. T h e CCI:r radicals were produced both by radiolysis of CC14 and by photolysis of CCI:$r. T h e rate constant for the reaction k l CCI:t + C-CeHlo -+ CHCI:3 + C-C,;Hg was found to he given by the equation log k , (M-I R-') = 7.64 -6.36/0 where I/ = 2.:303 HT kcal/mol. This activation energy leads to C--H bond strength for the allylic hydrogen of 85 f 1 kcal/mol, which means a resonance stabilization energy of 1 1 f 1.5 kcal/mol for the C-Cc;HII radical.

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