ISSN:
0538-8066
Keywords:
Chemistry
;
Physical Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
2-Methylbut-1-ene-3-yne and Propyne 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 m-xylene and p-xylene are also produced and were studied as the species of interest. The C8H10 formation rate is first-order in C3H4 and C5H6. The rate coefficient is best fitted by \documentclass{article}\pagestyle{empty}\begin{document}$$\log [k({\rm C}_{\rm 8} {\rm H}_{{\rm 10}}),M^{ - 1} s^{ - 1}] = (11.2 \pm 1.0) - (166 \pm 13)/2.3RT$$\end{document} though it is not inconsistent with \documentclass{article}\pagestyle{empty}\begin{document}$$\log [k({\rm C}_{\rm 8} {\rm H}_{{\rm 10}}),M^{ - 1} s^{ - 1}] = (8.17) - (125.9)/2.3RT$$\end{document} where R is the ideal gas constant in kJ/mol-K. Experiments in the presence of NO show that m-xylene and p-xylene formation occur by two processes: a concerted molecular mechanism (≃ 41%) and a singlet diradical mechanism (≃ 59%).
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/kin.550210304
