ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The pyrolysis of ethylbenzene has been investigated in shock waves with the laser schlieren technique. Mixtures of 1 and 2% ethylbenzene in krypton were studied for reaction conditions of 1300-1800 K, 70-550 torr. At high temperatures, the initial rapid endothermic dissociation is followed by a region of net exothermic reaction, which is readily understood as arising mainly from methyl radical recombination after dissociation to methyl and benzyl radicals. The initial unimolecular dissociation rates show no detectable dependence on pressure; with ΔH0298 = 75.7 kcal mol-1 these rates are \documentclass{article}\pagestyle{empty}\begin{document}$$ \log k({\rm s}^{{\rm - 1}}) = 13.49 - 60.0/\theta $$\end{document} An RRKM extrapolation suggests \documentclass{article}\pagestyle{empty}\begin{document}$$ \log k_\infty ({\rm s}^{{\rm - 1}}) = (15.95 \pm 0.3) - (74.7 \pm 2)/\theta $$\end{document} in excellent agreement with previous lower temperature data.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550180309
