Oxidation of Perhaloalkyl Radicals

Marsh and Heicklen116 studied the room-temperature photooxidation of C2F5I. They varied the C2F5I and 02 pressures from 10 to 300 torr and found that the ratio of the products, CFzO and CF3CFO, was invariant 

The ratio k19jk20 was 20. The intermediate C2F502 was shown to have a lifetime in excess of 10 7 sec from experiments in which HI was also present. In these experiments 4 (CF20) was markedly reduced whereas 4 (CF3CFO) was enhanced. The indicated step was 

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