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The radiolysis of trifluoroiodomethane at 1 atm pressure in Pyrex glass vessels has been examined. In vessels where the surface had been conditioned by a preirradiation technique the products and 100-eV yields are tetrafluoromethane, 1.08; iodine, 0.13; and difluorodiiodomethane, 0.82. When the surface was not conditioned, yields were erratic and hexafluoroethane, carbonyl fluoride, and silicon tetrafluoride were also formed. Experiments in the presence of oxygen as a radical scavenger indicate that the reaction proceeds mainly by a radical process.

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