Rate coefficient for the reaction of BrO with HO2 at 303 K

Abstract

The kinetics of the reaction of BrO with HO₂ have been investigated using the photolysis of O₃ in the presence of Br₂, H₂ and O₂ as a source of these radicals. The molecular-modulation–u.v.-absorption technique was employed to observe directly the behaviour of both BrO and HO₂ in the modulated photolysis system and to obtain a value for the rate coefficient for the reaction BrO + HO₂→ HOBr + O₂(3a), → HBr + O₃(3b) at 303 K. The value obtained was k₃= 5⁺⁵_–3× 10^–12 cm³ molecule^–1 s^–1.