Kinetics of CO+ and CO2+ with N and O atoms
Document Type
Article
Publication Date
2-28-2018
Abstract
We have measured reaction rate constants for CO+ and CO2+ reacting with N and O atoms using a selected ion flow tube apparatus equipped with a microwave discharge atom source. Experimental work was supplemented by molecular structure calculations. Calculated pathways show the sensitivity of kinetic barriers to theoretical methods and imply that high-level ab initio methods are required for accurate energetics. We report room-temperature rate constants of 1.0 ± 0.4 × 10-11 cm3 s-1 and 4.0 ± 1.6 × 10-11 cm3 s-1 for the reactions of CO+ with N and O atoms, respectively, and 8.0 ± 3.0 × 10-12 cm3 s-1 and 2.0 ± 0.8 × 10-11 cm3 s-1 for the reactions of CO2+ with N and O atoms, respectively. The reaction of CO2+ + O is observed to yield O2+ exclusively. These values help resolve discrepancies in the literature and are important for modeling of the Martian atmosphere.
Publication Title
Journal of Chemical Physics
Volume
148
Issue
8
Digital Object Identifier (DOI)
10.1063/1.5011195
PubMed ID
29495785
ISSN
00219606
Citation Information
Tenewitz, J.E., Le, T., Martinez, O., Ard, S.G., Shuman, N.S., Sanchez, J.C., Viggiano, A.A., Melko, J.J. (2018) Kinetics of CO+ and CO2+ with N and O atoms. Journal of Chemical Physics, 148(8), 084305. https://doi.org/10.1063/1.5011195