Negative ion reactions in nitrous oxide + carbon dioxide mixtures

Abstract

The rate constants have been measured for the following reactions in N₂O + CO₂ mixtures at pressures in the Torr region, using a drift tube and mass filter: NO^–+ 2CO₂→ CO₂·NO^–+ CO₂, k₉= 7.5 × 10^–29 cm⁶ molecule^–2 s^–1, NO^–+ CO₂→ NO + CO₂+ e, k₁₀= 1.0 × 10^–11 cm³ molecule^–1 s^–1, NO^–+ CO₂+ N₂O → CO^–₃+ N₂+ NO, k₁₂= 1.0 × 10^–27 cm⁶ molecule^–2 s^–1, → N₃O^–₂+ CO₂, or → CO₂·NO^–+ NO₂O, k₁₃= 1.5 × 10^–28 cm⁶ molecule^–2 s^–1. The results obtained here confirm the importance of collisional detachment from NO^– in N₂O negative ion chemistry.