Reaction of NH(X3Σ–) with O2(3Σ–g) and O2(1Δg) in the gas phase
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 81 (6) , 949-961
- https://doi.org/10.1039/f29858100949
Abstract
The reactions NH(3Σ–)+ O2(3Σ– g)→ products (1), NH(3Σ–)+ O2(1Δg)→ products (2) have been studied in an isothermal discharge-flow reactor with resonance absorption (H, O) and laser-induced fluorescence (OH, NH) detection methods. The NH radicals were produced via F + NH3→ NH2+ HF and NH2+ F → NH + HF. The O2(1Δg) source was either a chemical generator [Cl2+ H2O2→ O2(1Δg)+ 2HCl] or a microwave discharge in O2. For reaction (1) a pressure-independent (1.2 ⩽p/mbar ⩽ 10.5) rate constant: k1(T)= 7.6 × 1010 exp (–6.4 ± 0.6 kJ mol–1/RT) cm3 mol–1 s–1 was determined in the temperature range 286 ⩽T/K ⩽ 543. For reaction (2) an upper limit for the rate constant: k2(295 K)=(6 ± 1)× 109 cm3 mol–1 s–1 was obtained at room temperature. The mechanisms of reaction (1) and (2) are discussed.Keywords
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