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dc.creatorWörner, Hans Jakoben_US
dc.creatorMerkt, F.en_US
dc.date.accessioned2008-01-11T21:36:48Z
dc.date.available2008-01-11T21:36:48Z
dc.date.issued2005en_US
dc.identifier2005-FD-07en_US
dc.identifier.urihttp://hdl.handle.net/1811/30287
dc.descriptionrule a. S. Willitsch, J.M. Dyke and F. Merkt, Helv. Chim. Acta, {\bf 86en_US
dc.descriptionAuthor Institution: PHYSIKALISCHE CHEMIE, ETH ZURICH, CH-8093 ZURICHen_US
dc.description.abstractThis presentation summarizes the results of the first photoelectron spectroscopic study of the cyclopentadienyl radical. The cyclopentadienyl radical was produced in a supersonic expansion by photolysis of cyclopentadiene at 248 nm using the method described in Ref. a. PFI-ZEKE photoelectron spectra were recorded using two different excitation schemes. In the first experiment single-photon excitation from the $\tilde{X}$ $^2$E$_1''$ ground state of the radical was used to study the ground state of the cyclopentadienyl cation. In the second experiment, a resonance-enhanced two-photon excitation scheme via the vibrationless transition to the $\tilde{A}$ $^2$A$_2''$ studied in Ref. b provided access to the first electronically excited state of the cyclopentadienyl cation. The analysis of the spectra reveals that the ground state of the cyclopentadienyl cation is a triplet state of electronic symmetry $^3$A$_2'$ and the first excited state is a singlet of symmetry $^1$E$_2'$, which is subject to a pronounced Jahn-Teller distortion. The results of {\it ab initio} calculations together with a preliminary analysis of the Jahn-Teller effect in the $^1$E$_2'$ state are presented. \\ }, 1152 (2003).\\ b. L. Yu, S.C. Foster, J.M. Williamson, M.C. Heaven and T.A. Miller, J. Chem. Phys. {\bf 92}, 4263 (1988).en_US
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleHIGH-RESOLUTION PFI-ZEKE PHOTOELECTRON SPECTROSCOPY OF THE CYCLOPENTADIENYL RADICALen_US
dc.typearticleen_US


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