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Gas-phase pyrolysis of neopentyl bromide

✍ Scribed by Robert L. Failes; Yousuf M. A. Mollah; Jacob S. Shapiro

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
537 KB
Volume
13
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The pyrolysis of gaseous neopentyl bromide to 2‐methyl‐2‐butene, 2‐methyl‐1‐butene, and hydrogen bromide was studied under conditions of maximal inhibition by cyclohexene over the temperature range of 389−444°C. This reaction was shown to beconsistent with a first‐order homogeneous molecular process, with Arrhenius parameters of E = 247 ± 5 kJ/mol and log A (sec^−1^) = 14.2 ± 0.3. Examination of the uninhibited reaction showed it to be a radical process, simpler than that with neopentyl chloride, there being only one propagation step, thedissociation of the γ‐radical to 1,1‐dimethylcyclopropane and a bromine atom.

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