ONE-WAY ISOMERIZATION AND INTERNAL-ROTATION IN ANTHRYLETHYLENES IN THE EXCITED TRIPLET-STATE

Authors
ARAI T YUDA Y SANO K
Citation
T. Arai et al., ONE-WAY ISOMERIZATION AND INTERNAL-ROTATION IN ANTHRYLETHYLENES IN THE EXCITED TRIPLET-STATE, Research of chemical intermediates, 21(8-9), 1995, pp. 961-972
Citations number
21
Categorie Soggetti
Chemistry
Journal title
Research of chemical intermediates → ACNP
ISSN journal
09226168
Volume
21
Issue
8-9
Year of publication
1995
Pages
961 - 972
Database
ISI
SICI code
0922-6168(1995)21:8-9<961:OIAIIA>2.0.ZU;2-R
Abstract
1-(2-Anthryl)-2-(bromophenyl)ethylene and 1-(2-anthryl)-2-(4-methoxyph enyl)ethylene undergo cis --> trans one-way isomerization in the excit ed triplet state through an adiabatic process from the cis-triplet to the trans-triplet states. The Irans-isomers of these compounds undergo one-way internal rotation in the excited triplet state with an activa tion barrier of similar to 7 kcal mol(-1) and a frequency factor of si milar to 10(12) s(-1), while no internal rotation takes place in the e xcited singlet state.