Abstract
While the photodissociation of ketene (CH2CO) has been used to generate the methylene (CH2) radical for many years, there are only a few studies on the mechanism of the dissociation in the far-uv region. Allen and Schaefer1 calculated energies and dissociation pathways of several low-lying electronic states of ketene and predicted that it dissociates monotonically on 1B1 surface through an out-of-plane bent transition state ( pathway). Sonobe and Rosenfeld2 photolyzed ketene with an ArF excimer laser and observed a rotationally hot CO fragment, from which they concluded that the transition state of the dissociation must have a bent CCO skeleton. Unfried and co-workers3 photolyzed ketene with 193-nm radiation and observed ketenyl (CHCO) as well as carbon monoxide fragments. However, there has not been any direct experimental examination of the dissociation pathway on the 1B1 surface.
© 1992 Optical Society of America
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