
%0 Journal Article
%A Solly, RK 
%A Cain, EN 
%T The radical stabilization energy due to an a-chlorine atom from the kinetics of the thermal isomerization of 1-Chlorobicyclo[2,2,0]hexane in the gas and liquid phase
%J Australian Journal of Chemistry
%D 1975/09/01
%V 28
%N 9
%P 2079-2082
%K 
%R https://doi.org/10.1071/CH9752079
%U https://www.publish.csiro.au/paper/CH9752079 
%X The rate of isomerization of 1-chlorobicyclo[2,2,0]hexane to 2- chlorohexa-1,5-diene, both in the gas phage and in solution, has been measured over the temperature range 409-497 K. The Arrhenius parameters derived from these rates are represented by the equations                                   log(kg/s-1)=(13.49±0.08)-(148.2±0.6/&#952;                                log(ka/s-1)=(13.21±0.12)-(144.44±0.50)/&#952;  and                              log(kb/s-1)=(13.25±0.44)-(144.8±1.6)/&#952;  where the subscripts g, a and b refer to the gas phase, tetrachloroethylene as solvent and o-dichloro-benzene as solvent respectively, &#952; = 19.15 kJ mol-1 and the errors are least-squares deviations. A radical stabilization energy of 5±2 kJ mol-1 for the &#945;- chlorine atom derived from these Arrhenius parameters is in excellent agreement with the value derived from kinetics of the isomerization of 1,4-dichlorobicyclo[2,2,0]hexane and from the thermochemistry of chloroethyl radicals. 
