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Direct evidence of a radical channel in photodissociation of 1,4-cyclohexadiene with ArF laser at 193 nm
- Source :
- Chemical Physics Letters. 309:191-197
- Publication Year :
- 1999
- Publisher :
- Elsevier BV, 1999.
-
Abstract
- Flash-photolysis of 1,4-cyclohexadiene with ArF laser at 193 nm is investigated. Cyclohexadienyl radical with λ max at 300 nm is observed as direct evidence for the simultaneous occurrence of a radical dissociation channel along with the concerted molecular channel to form benzene and hydrogen. The radical decays with first-order kinetics with a rate coefficient of (3.0±0.2)×10 4 s −1 . The activation barrier and enthalpy of reaction are evaluated using semi-empirical PM3MM and HF/STO-3G theories and compared with available experimental results.
Details
- ISSN :
- 00092614
- Volume :
- 309
- Database :
- OpenAIRE
- Journal :
- Chemical Physics Letters
- Accession number :
- edsair.doi...........e1237a414102b7b3025f5d7e61d2df1e