Negative Ion Reactions in Nitrous Oxide-I-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.