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Ene reactions of olefins, part II. The addition of ethylene to propylene and to isobutene and the addition of propylene to propylene

✍ Scribed by C. Richard; M. H. Back

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
651 KB
Volume
10
Category
Article
ISSN
0538-8066

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✦ Synopsis

Abstract

The pyrolysis of ethylene–propylene and ethylene–isobutene mixtures has been studied in a static system over the temperature range of 682°–754° K and for initial pressures of each olefin of 33–300 torr. The following molecular ene reactions were observed and the rate constants measured:
equation image
Using thermodynamic data, rate constants for the corresponding retro‐ene decomposition reactions were calculated and compared to kinetic data reported for similar compounds. Other products were formed by radical chain processes, the main higher molecular weight ones being cyclopentene and 1‐methylcyclopentene. A mechanism involving addition of allyl radicals is suggested for the formation of these products.

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## Abstract The pyrolysis of ethylene–butene‐2 mixtures has been studied in a static system over the temperature range of 689°‐754°k and for initial pressures of each olefin of 20–200 torr. The two main addition products were cyclopentene and 3‐methylpentene‐1. Kinetic evidence indicated that cyclo