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- W4248150301 abstract "The photochemical decomposition of CFCl3 and CF2Cl2 has been investigated, using added CH4 and C2H6 as chlorine atom interceptors. From the quantum yields of the stable products formed at 213.9, 184.9, 163.3 and 147 nm, quantum yields of the primary photofragments CFCl2, CF2Cl, CFCl, CF2, CF and Cl, were derived. At wavelengths close to the absorption threshold, detachment of one chlorine atom from CFCl3 and CF2Cl2 occurs with a quantum yield of 0.95 ± 0.05. As the photon energy is increased, there is a rapidly increasing probability that absorption of a photon will lead to the release of two chlorine atoms: The CFCl or CF2 formed in these processes (which are most likely in the ground singlet state) are unreactive towards the parent halocarbons, or alkanes. They combine with other free radicals to form stable products. No evidence was found for the cleavage of CF bonds, or the elimination of stable chlorine molecules. In the vicinity of the absorption threshold, the absorption cross-sections of CF2Cl2 and CFCl3 diminish sharply with a decrease in temperature." @default.
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- W4248150301 date "1975-01-01" @default.
- W4248150301 modified "2023-09-25" @default.
- W4248150301 title "Photodecomposition of CFCl3 and CF2Cl2" @default.
- W4248150301 doi "https://doi.org/10.1016/0047-2670(75)85010-6" @default.
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