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Kinetics of the pyrolyses of endo- and exo-5-methylbicyclo (2.2.2) oct-2-ene in the gas phase

✍ Scribed by G. Huybrechts; G. Ngoy

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
389 KB
Volume
7
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The pyrolyses of endo‐ and exo‐5‐methylbicyclo (2.2.2) oct‐2‐ene (endo‐ and exo‐MBO) have been studied between 608 and 679°K at pressures between 7 and 37 torr. These reactions correspond to parallel first‐order eliminations of propene and ethylene:
equation image
The rate constants (in sec^−1^) for endo‐MBO are given by

and those for exo‐MBO by

Reaction mechanisms involving diradicals are shown to be compatible with the experimental results. The heats of formation and the entropies of endo and exo‐MBO are estimated.

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