Measurements of Rate Constants for Termolecular Reactions of O(3P) with NO, O2, CO, N2, and CO2 Using a Pulsed Vacuum-uv Photolysis—Chemiluminescent Method

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Abstract
Absolute rate constants for a number of termolecular reactions of O atoms were determined at 300°K. Oxygen atoms were generated by pulsed vacuum-uv photolyses of NO, O2, CO2, and N2O and were monitored by NO2* or CO2* chemiluminescent emission. The rate constants k, in units of cm6 molecule−2·second−1, for the following reactions are: O+NO+NO→NO2+NO, k=1.5×10−31 (± 10 %) O+NO+He→NO2+He, k=6.65×10−32 (± 10%) O+O2+O2→O3+O2, k=6.4×10−34 (± 25 %) O+O2+N2→O3+N2, k=5.4×10−34 (± 25 %) O+O2+CO→O3+CO, k=6.7×10−34 (± 25 %) O+CO+CO→CO2+CO, k=3.2×10−36 (± 25 %) O+CO+N2→CO2+N2, k=2.2×10−36 (± 25 %) O+CO+He→CO2+He, k=1.7×10−36 (± 25 %) O+CO2+CO→CO3+CO, k〈9×10−36 O+N2+N2→N2O+N2, k〈5×10−38.