ISSN:
0538-8066
Schlagwort(e):
Chemistry
;
Physical Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Mixtures of up to 14% azomethane in propane have been photolyzed using mainly 366 nm radiation in the ranges of 323-453 K and 25-200 torr. Detailed measurements were made of the yields of nitrogen, methane, and ethane. Other products observed were isobutane, n-butane, ethene, and propene. A detailed mechanism is proposed and shown to account for the observed variation of product yields with experimental conditions. The quantum yield of the molecular process \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm CH}_3 {\rm N}_2 {\rm CH}_3 + h\nu \to {\rm C}_2 {\rm H}_6 + {\rm N}_2 $$\end{document} is found to be given by the temperature-independent equation\documentclass{article}\pagestyle{empty}\begin{document}$$ \phi _2 = 0.0092 \pm 0.0005] $$\end{document} The values of rate constants obtained are \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm log} k_3 ({\rm cm}^3 /{\rm mol}\,{\rm sec}) = 12.03 \pm 0.15 - 40.8 \pm 1.1{\rm kJ}/{\rm mol}/(2.3RT) $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm log}k_4 ({\rm cm}^3 /{\rm mol}\,{\rm sec}) = 11.42 \pm 0.15 - 40.7 \pm 1.1{\rm kJ}/{\rm mol}/(2.3RT) $$\end{document} where the reactions are and it is assumed that the rate constant for the reaction is given by \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm log}k_5 ({\rm cm}^3 /{\rm mol}\,{\rm sec}) = 13.4 $$\end{document}
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/kin.550121212
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