ISSN:
0538-8066
Schlagwort(e):
Chemistry
;
Physical Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The kinetics of the reaction of O + CH3OCH3 were investigated using fast-flow apparatus equipped with ESR and mass-spectrometric detection. The concentration of O(3P) atoms to CH3OCH3 was varied over an unusually large range. The rate constant for reaction \documentclass{article}\pagestyle{empty}\begin{document}$${\rm O} + {\rm CH}_{\rm 3} {\rm OCH}_3 \to {\rm OH} + {\rm CH}_{\rm 2} {\rm OCH}_{\rm 3} $$\end{document} was found to be k = (5.0 ± 1.0) × 1012 exp [(-2850 ± 200/RT)] cm3 mole-1 sec-1. The reaction O + CH3OH was studied using ESR detection. Based on an assumed stoichiometry of two oxygen atoms consumed per molecule of CH3OH which reacts, we obtain a value of k = (1.70 ± 0.66) × 1012 exp [(-2,280 ± 200/RT)] cm3 mole-1 sec-1 for the reaction \documentclass{article}\pagestyle{empty}\begin{document}$${\rm O} + {\rm CH}_{\rm 3} {\rm OH} \to {\rm OH} + {\rm CH}_{\rm 2} {\rm OH}$$\end{document} The results obtained in this study are compared with the results from other workers on these reactions. The observation of essentially equal activation energies in these two reactions is indicative of approximately equal C—H bond strengths in CH3OCH3 and CH3OH. This is in agreement with recent measurements of these bond energies.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/kin.550040109
