title: Electronic spectra and photodissociation of vinyl chloride: a symmetry-adapted cluster configuration interaction study.
abstract: The vertical absorption spectrum and photodissociation mechanism of vinyl chloride (VC) were studied by using symmetry-adapted cluster configuration interaction theory. The important vertical pi --> pi* excitation was intensively examined with various basis sets up to aug-cc-pVTZ augmented with appropriate Rydberg functions. The excitation energy for pi --> pi* transition obtained in the present study, 6.96 eV, agrees well with the experimental value, 6.7-6.9 eV. Calculated excitation energies along with the oscillator strengths clarify that the main excitation in VC is the pi --> pi* excitation. Contrary to the earlier theoretical reports, the results obtained here support that the C-Cl bond dissociation takes place through the n(Cl-)sigma(C-Cl)* state.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyou-ku, Kyoto 615-8510, Japan.
authors.forename: Sundaram
authors.initials: S
authors.lastname: Arulmozhiraja
authors.forename: Ryoichi
authors.initials: R
authors.lastname: Fukuda
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ehara
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Nakatsuji