Abstract
Photolysis of solid equimolar mixtures of CH4 and F2 at 16 K leads to formation of spatially isolated CH3F, CH2F2 and HF, whereas in methane-diluted mixtures ([CH4]:[F2] = 60:1) cage formation of CH3F…HF complexes prevails; the observed quadratic relation between CH2F2 concentration and exposure dose and high quantum yield of the secondary product (per CH3F molecule formed) means that CH2F2 molecules are formed from CH3F, generated by the growth of previous chains.
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