ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Vinylacetylene and 2-butyne mixtures were pyrolyzed at 350-450°C in the absence and presence of O2 and NO. The major product of the reaction is a polymer, but o-xylene is also produced and was studied as the species of interest. The C8H10 formation rate is first-order in C4H4 and C4H6. The rate coefficient is best fitted by \documentclass{article}\pagestyle{empty}\begin{document}$$\log {\rm [}k{\rm (C}_{\rm 8} {\rm H}_{{\rm 10}}),{\rm M}^{{\rm -1}}\, {\rm s}^{{\rm - 1}}] = (4.33 \pm 0.58) - (80.1 \pm 7.4)/2.3RT$$\end{document} though it is not inconsistent with \documentclass{article}\pagestyle{empty}\begin{document}$$\log {\rm [}k{\rm (C}_{\rm 8} {\rm H}_{{\rm 10}}),{\rm M}^{{\rm - 1}}\, {\rm s}^{{\rm - 1}}] = (7.93) - (125.9)/2.3RT$$\end{document} where R is the ideal gas constant in kJ/mol-K. O-xylene formation occurs by two processes: a concerted molecular mechanism (⋍67%) and a singlet diradical mechanism (⋍33%).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550200103
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