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# The photoionization dynamics of the three structural isomers of dichloroethene

Parkes, M. A. and Ali, S. and Howle, C. R. and Tuckett, R. P. and Malins, A. E. R. (2007) The photoionization dynamics of the three structural isomers of dichloroethene. Molecular Physics, 105 (5-7). pp. 907-916. ISSN 0026-8976

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URL of Published Version: http://dx.doi.org/10.1080/00268970600976055

Identification Number/DOI: doi:10.1080/00268970600976055

Using tunable vacuum-UV radiation from a synchrotron, the threshold photoelectron spectrum, threshold photoelectron photoion coincidence spectrum and ion breakdown diagram of the 1,1, cis-1,2 and trans-1,2 isomers of C$$_2$$H$$_2$$Cl$$_2$$ have been recorded in the range 9-23 eV. The energies of the peaks in the threshold photoelectron spectrum are in good agreement with outer-valence Greens function caculations. The major difference between the isomers, both predicted and observed experimentally is that the F and G states of C$$_2$$H$$_2$$Cl$$_2^+$$ are approximately degenerate for 1,1 and trans-1,2, but well separated for the cis-1,2 isomer. The ground and low-lying valence states of C$$_2$$H$$_2$$Cl$$_2^+$$ are bound, with higher-lying states dissociating to C$$_2$$H$$_2$$Cl$$^+$$ or C$$_2$$H$$_2^+$$. The translational kinetic energy release into C$$_2$$H$$_2$$Cl$$^+$$ + Cl is determined as a function of energy. Isolated-state behaviour for the low-lying electronic states of C$$_2$$H$$_2$$Cl$$_2^+$$ becomes more statistical as the energy increases.

Type of Work: Article 2007 (Publication) Schools (1998 to 2008) > School of Chemical Sciences School of Chemistry QD ChemistryQC Physics University of Birmingham Taylor & Francis 764 YES

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