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Thermal isomerization of cis ‐ or trans ‐2‐butene. The unimolecular elimination of hydrogen from cis ‐2‐butene around 500°C
Author(s) -
Masson D.,
Richard C.,
Martin R.
Publication year - 1976
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550080106
Subject(s) - chemistry , isomerization , 2 butene , reaction rate constant , torr , hydrogen , cis–trans isomerism , butene , photochemistry , thermal , atmospheric temperature range , medicinal chemistry , thermodynamics , kinetics , catalysis , stereochemistry , organic chemistry , ethylene , physics , quantum mechanics
An analytical and kinetic study of the thermal reaction of cis ‐ or trans ‐2‐butene has been performed in a static system over the temperature range of 480–550°C and at a low extent of reaction and initial pressures of 10–100 torr. The rate constant of the unimolecular cis–trans isomerization of cis ‐2‐butene, determined under the conditions\documentclass{article}\pagestyle{empty}\begin{document}$$k_{ct} = 10^{13.6 \pm 0.3 - 62,000 \pm 1000/2.3{\rm RT}} {\rm sec}^{- 1} $$\end{document}(2.3 RT in cal/mole) is in good agreement with previous measurements made at lower pressures. A comparison between the formation rates of hydrogen from the thermal reactions of cis ‐ and trans ‐2 butene around 500°C leads to the rate constant value\documentclass{article}\pagestyle{empty}\begin{document}$$k_m = 10^{13 \pm 0.5 - 65,500 \pm 2000/2.3{\rm RT}} {\rm sec}^{- 1} $$\end{document}(2.3 RT in cal/mole) for the unimolecular 1,4hydrogen elimination from cis 2butene.