Reactions of trifluoromethyl radicals with organic halides. Part 4.—Chloromethanes, using hexafluoroazomethane as a source of radicals

Abstract

Hexafluoroazomethane was decomposed photochemically and thermally in the presence of chloroform, of carbon tetrachloride and of mixtures of methyl chloride and carbon tetrachloride, in the vapour phase. Arrhenius parameters were measured for the reactions, CF₃+CH₃Cl→CF₃H+CH₂Cl CF₃+CCl₄→CF₃Cl+CCl₃ [graphic omitted] The results support those obtained previously using hexafluoroacetone as a source of CF₃ radicals. Such discrepancies as are observed are probably caused by anomalies in the mechanism of the decomposition of hexafluorozomethane.