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Thermal isomerization of cis- or trans-2-butene. The unimolecular elimination of hydrogen from cis-2-butene around 500°C

✍ Scribed by D. Masson; C. Richard; R. Martin


Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
300 KB
Volume
8
Category
Article
ISSN
0538-8066

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✦ Synopsis


Abstract

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

(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

(2.3 RT in cal/mole) for the unimolecular 1,4hydrogen elimination from __cis__2butene.


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H2S-promoted thermal isomerization of bu
✍ C. Richard; A. Boiveaut; R. Martin 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 470 KB

H2S increases the thermal isomerization of butene-2 cis (B,) to butene-1 (B1) and butene-2 trans (Bt) around 500°C. This effect is interpreted on the basis of a free radical mechanism in which buten-2-yl and thiyl free radicals are the main chain carriers. B1 formation is essentially explained by th