Isotopic exchange reactions of atomic oxygen produced by the photolysis of NO2 at 3660 Å

Abstract

Isotopically labelled atomic oxygen, produced by the photolysis of N¹⁸O₂ at 3660 Å, was allowed to react with CO, CO₂, N₂O, O₂ and COCl₂, respectively. The rates and mechanisms of the exchange reactions are discussed. The specific rate constants were determined for the process, O^*+XO→O^*X+O. They are 6.2 × 10¹⁰ exp [(–6900±700)/RT], 6.3 × 10⁸ exp [(–3500±200)/RT], 9.6 × 10⁸ exp [(–4400±800)/RT], and 3.9 × 10⁹ exp [(–1100±400)/RT] 1. mole^–1 sec^–1 for CO, CO₂, N₂O and O₂ respectively.