Absolute rate constants for the reaction of OH radicals with allene, 1,3-butadiene, and 3-methyl-1-butene over the temperature range 299–424 °K

Abstract

Absolute rate constants for the reaction of OH radicals with allene, 1,3‐butadiene, and 3‐methyl‐l‐butene have been determined over the temperature range 299–424 °K, using a flash photolysis–resonance fluorescence technique. The Arrhenius expressions obtained were k (allene) =5.59×10⁻¹² e^{(305±300)/RT} cm³ molecule⁻¹ sec⁻¹, k (1,3‐butadiene) =1.45×10⁻¹¹ e^{(930±300)/RT} cm³ molecule⁻¹ sec⁻¹, k (3‐methyl‐1‐butene) =5.23×10⁻¹² e^{(1060±300)/RT} cm³ molecule⁻¹ sec ⁻¹, with rate constants at room temperature of (9.30±0.93) ×10⁻¹², (6.85±0.69) ×10⁻¹¹, and (3.10±0.31) ×10⁻¹¹ cm³ molecule⁻¹ sec⁻¹ for allene, 1,3‐butadiene, and 3‐methyl‐l‐butene, respectively.