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The gas phase photolysis of CHFCl2
Affiliation:1. The Research Laboratories, May & Baker Limited, Essex, United Kingdom;2. Lennard-Jones Laboratories, School of Physical and Geographical Sciences, Keele University, Staffordshire, United Kingdom
Abstract:The photolysis of CHFCl2 at 300 K has been investigated at 213.9, 163.3 and 147 nm. Methane, Br2, HBr and HCl were added as free radical interceptors in order to unravel the primary photodecomposition processes. Analysis of the data shows that at 213.9 and 163.3 nm the photodissociative process
></figure> occurs with a quantum yield of 0.9 – 1.0, giving stable CHFCl radicals. At shorter wavelengths the quantum yield of CHFCl shows a drastic decrease with concurrent appearances of species such as CFCl, CHF and CF. The laboratory experiments indicate that CF is mainly formed via the dissociative process <figure class=></figure> The CF radicals react with CH<sub>3</sub> to yield C<sub>2</sub>H<sub>2</sub> (CF + CH<sub>3</sub> → C<sub>2</sub>H<sub>2</sub> + HF) while the CHF species insert readily into HCl to yield CH<sub>2</sub>FCl. In the presence of Br<sub>2</sub>, CF and CHF undergo reactions which result in the formation of CFBr<sub>3</sub> and CHFBr<sub>2</sub> respectively.</td> </tr> <tr> <td align=
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