The near ultraviolet dissociation dynamics of azomethane: Correlated V-T energy disposal and product appearance times
- Department of Chemistry, University of California, Berkeley, California 94720 (United States)
- Department of Chemistry, Texas AM University, P.O. Box 30012, College Station, Texas 77842 (United States)
- Chemical Sciences Division, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
We have measured the translational energy release for methyl radical photofragments with zero and one quantum of umbrella vibration, which were produced by the ultraviolet dissociation of azomethane. Translational energy distributions exhibit bimodal structure and are similar for both methyl radical vibrational states and for two dissociation wavelengths (355 and 330 nm). Compared to earlier non-state-selective measurements, these distributions exhibit a stronger preference for high kinetic energies. We have also observed that the appearance times for both methyl radical vibrational states are fast compared to the experimental time resolution, thus resolving an outstanding mechanistic disagreement. These observations are consistent with a previously proposed mechanism in which a concerted three-body dissociation follows randomization of parent internal energy. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 662198
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 17 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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