Rate constants for the interaction of trifluoromethyl radicals with oxygen and fluorine

Abstract

The absolute rate constants for the reactions of trifluoromethyl radicals with fluorine (I) and oxygen (II), k₁=(3.1±2.1)×10⁻¹¹ exp [−(4600±300)/RT] (cm³/molec sec) and k₂=(2.5±1.7)×10⁻¹¹ exp [−(2100±300)/RT] (cm³/molec sec). have been determined from the relative rate constants for the reactions of trifluoromethyl radicals with oxygen and chlorine (IV):k₂/k₄=(3.6±1.6)exp [(1600±300)/RT] (T=269–356 K) obtained by the photolysis of a mixture of hexafluoroacetone (HFA) with O₂ and Cl₂.

Abstract

Абсолютные константы скорости реакций трифторметильного радикала с фтором (I) и кислородом (II) k₁=(3,1±2,1)·10⁻¹¹ exp[−(4600±300)/RT] (cm³/молек. сек), k₂=(2,5±1,7)·10⁻¹¹ exp[−(2100±300)/RT] (cm³/молек. сек) определены на основании полученното при фотолизе смеси гексафторццетона с кислородом и хлором отношения констант скорости реакций трифторметильного радикала с O₂ и Cl₂ (ІУ) k₂/k₄=(3,6±1,6)exp[(1600±300)/RT](T=296–356° K).