Kinetics of some reactions of vinyl and isopropyl radicals in the gas phase

Vinyl and isopropyl radicals were generated by the pyrolysis of azoisopropane in the presence of acrolein at 473–563 K. Reaction products were analyzed by gas chromatography. Rate constant ratios k 2 / k 1 = 0.02 ± 0.01 and k 4 / k 3 = 0.01 ± 0.005 are suggested for the following reactions:The rate constant ratio of reactions (7) and (c) obeys the Arrhenius equation\documentclass{article}\pagestyle{empty}\begin{document}$$ k_7 /k_c^{1/2} = (1.02 \pm 0.7)10^7 \,{\rm exp[ - (28}{\rm .42} \pm {\rm 2}{\rm .97)kJ/}RT]\,{\rm dm}^{{\rm 3/2}} \,{\rm mol}^{{\rm - 1/2}} \,{\rm s}^{{\rm - 1/2}} $$\end{document}The Arrhenius equation was derived for ( k 8 + k 9 ).