Kinetics of CO + and CO 2 + with N and O atoms

We have measured reaction rate constants for CO and CO 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 bar...

Full description

Saved in:
Bibliographic Details
Published in:The Journal of chemical physics 2018-02, Vol.148 (8), p.084305
Main Authors: Tenewitz, Jake E, Lê, Trí, Martinez, Jr, Oscar, Ard, Shaun G, Shuman, Nicholas S, Sanchez, Jenny C, Viggiano, Albert A, Melko, Joshua J
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have measured reaction rate constants for CO and CO 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 cm s and 4.0 ± 1.6 × 10 cm s for the reactions of CO with N and O atoms, respectively, and 8.0 ± 3.0 × 10 cm s and 2.0 ± 0.8 × 10 cm s for the reactions of CO with N and O atoms, respectively. The reaction of CO + O is observed to yield O exclusively. These values help resolve discrepancies in the literature and are important for modeling of the Martian atmosphere.
ISSN:1089-7690