Electronic spectroscopy of the cis and trans isomers of 1-methyl-2-phenylcyclopropane

Autor:	Abdulhamid Hamza, John R. Cable
Rok vydání:	2012
Předmět:	Excited electronic state Chemistry General Physics and Astronomy Internal bond Photochemistry Electron spectroscopy Spectral line Excited state Ionization Physics::Atomic and Molecular Clusters Physics::Chemical Physics Physical and Theoretical Chemistry Cis–trans isomerism Excitation
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:	https://explore.openaire.eu/search/publication?articleId=doi_________::80fc7fcf50dbb8e9c517afadab2ed616 https://doi.org/10.1016/j.cplett.2012.01.022 Zobrazit plný text záznamu Full Text from ScienceDirect