Rate constants for the reaction of OH radicals with CHFCl2 and CH3Cl over the temperature range 298–423 °K, and with CH2Cl2 at 298 °K

Abstract

Rate constants for the reaction of OH radicals with CHFCl₂ and CH₃Cl have been determined over the temperature range 298–423 °K using a flash photolysis–resonance fluorescence technique. The Arrhenius expressions obtained were k₁(CHFCl₂) =1.75×10⁻¹²e^{−(2490±300)/RT} cm ³ molecule⁻¹ sec⁻¹, k₁(CH₃Cl) =4.1×10⁻¹² e^{−(2700±300)/RT} cm³ molecule⁻¹ sec⁻¹. In addition, the rate constant for the reaction of OH radicals with CH₂Cl₂ was determined to be k₁(CH₂Cl₂) = (1.45±0.20) ×10⁻¹³ cm³ molecule⁻¹ sec⁻¹ at 298.5 °K. These rate constants are in good agreement with literature values.