Dynamics of the O(1D)+CO2 oxygen isotope exchange reaction

The O1(D1)+CO2 oxygen isotope exchange reaction has been studied using a crossed molecular beam apparatus at a collision energy of 7.7 kcal/mol. Two different reaction channels are observed, both proceeding via a relatively long-lived CO3 complex. Electronic quenching of O(1D) is the major channel,...

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Bibliographic Details
Published in:The Journal of chemical physics 2003-10, Vol.119 (16), p.8213-8216
Main Authors: Perri, Mark J., Van Wyngarden, Annalise L., Boering, Kristie A., Lin, Jim J., Lee, Yuan T.
Format: Article
Language:English
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Summary:The O1(D1)+CO2 oxygen isotope exchange reaction has been studied using a crossed molecular beam apparatus at a collision energy of 7.7 kcal/mol. Two different reaction channels are observed, both proceeding via a relatively long-lived CO3 complex. Electronic quenching of O(1D) is the major channel, accounting for 68% of all isotope exchange, while 32% occurs without quenching. These results are the first experimental evidence that isotope exchange can occur through a long-lived CO3 intermediate without subsequent crossing to the triplet surface, and could prove important for atmospheric models of oxygen isotope exchange between CO2 and O3.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1618737