title: Photodissociation spectroscopy and dynamics of the CH2CFO radical.
abstract: The photodissociation spectroscopy and dynamics resulting from excitation of the B (2)A(")<--X (2)A(") transition of CH(2)CFO have been examined using fast beam photofragment translational spectroscopy. The photofragment yield spectrum reveals vibrationally resolved structure between 29 870 and 38 800 cm(-1), extending approximately 6000 cm(-1) higher in energy than previously reported in a laser-induced fluorescence excitation spectrum. At all photon energies investigated, only the CH(2)F+CO and HCCO+HF fragment channels are observed. Both product channels yield photofragment translational energy distributions that are characteristic of a decay mechanism with a barrier to dissociation. Using the barrier impulsive model, it is shown that fragmentation to CH(2)F+CO products occurs on the ground state potential energy surface with the isomerization barrier between CH(2)CFO and CH(2)FCO governing the observed translational energy distributions.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, USA.
authors.forename: Alexandra A
authors.initials: AA
authors.lastname: Hoops
authors.forename: Jason R
authors.initials: JR
authors.lastname: Gascooke
authors.forename: Kathryn E
authors.initials: KE
authors.lastname: Kautzman
authors.forename: Ann Elise
authors.initials: AE
authors.lastname: Faulhaber
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Neumark