Autor: |
Abdulhamid Hamza, John R. Cable |
Rok vydání: |
2012 |
Předmět: |
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Zdroj: |
Chemical Physics Letters. 527:16-21 |
ISSN: |
0009-2614 |
Popis: |
Vibrationally resolved electronic spectra of jet-cooled cis and trans isomers of 1-methyl-2-phenylcyclopropane (cis-MPCP and trans-MPCP) were recorded using resonant two-photon ionization. Each isomer was found in a single conformation. Spectroscopic evidence reveals that in the trans isomer the plane of the phenyl ring bisects the 60° internal bond angle of the cyclopropyl ring in both the ground and excited electronic states. Extensive Franck–Condon activity in the low-frequency phenyl torsion mode is observed in the spectrum of cis-MPCP, suggesting that a substantial change in torsional geometry is induced by electronic excitation. Excited state CIS calculations predict that the phenyl ring rotates over 20° toward a bisected conformation in the excited state. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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