Absolute rate of recombination of CF2Cl· radicals

Abstract

When 1,3-dichlorotetrafluoroacetone is photolyzed in the presence of undecafluorocyclohexane, the CF₂Cl· radicals produced in the primary photochemical step abstract hydrogen atoms to produce chlorodifluoromethane. An investigation of this reaction under the conditions of intermittent illumination has been carried out to determine the rate of recombination of CF₂Cl· radicals. The determined value of 1.31 × 10¹³ cm³ mol^–1 s^–1 for the rate constant is between those for CF₃· and CCl₃· radicals.