Matrix Isolation Infrared Spectra of Methylacetate III. UV-Induced Z→E photorotamerisation of Methylacetate in Argon Matrices
作者:
S. Lenaerts,
F. Daeyart,
B.J. Vanderveken,
G. Maes,
期刊:
Spectroscopy Letters
(Taylor Available online 1989)
卷期:
Volume 22,
issue 3
页码: 289-305
ISSN:0038-7010
年代: 1989
DOI:10.1080/00387018908053878
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Broadband UV-irradiation of methylacetate isolated in argon matrices causes rather strong modifications to appear in the IR spectrum. Evidence was obtained for a photochemical interconversion of the stable Z-conformer into the less stable E-conformer followed by photolytic decomposition of the latter into stable products. Most of these products could be identified from their IR absorptions. The reverse E→Z interconversion is a thermal process with an activation energy of about 10 kJmole−1. A normal coordinate analysis based on a transferable valence force field obtained from the literature allowed to assign approximate IR frequencies of E-methylacetate.
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