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Very low pressure pyrolysis of phenyl acetate

✍ Scribed by E. Ghibaudi; A. J. Colussi

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 422 KB
Volume: 16
Category: Article
ISSN: 0538-8066
DOI: 10.1002/kin.550161211

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✦ Synopsis

The kinetics of the unimolecular decomposition of phenyl acetate into phenol and ketene, reaction (1):

has been studied under very low-pressure conditions between 950 and 1120 K. In this range alternative processes such as the Fries rearrangement to o-hydroxyacetophenone or bond fission into phenoxyl and acetyl radicals are not observed. Based on present and previous evidence a novel four-center transition state is proposed for reaction (1) which corresponds to the high-pressure Arrhenius expression log (k,, s-'1 = 12.8 -56.2/0, 0 = 4.575 x 10-3T kcal/mol.

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