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Reactions of O22+ with CO2, OCS and CS2

Parkes, MA; Lockyear, JF; Price, SD; (2013) Reactions of O22+ with CO2, OCS and CS2. International Journal of Mass Spectrometry , 354-35 pp. 39-45. 10.1016/j.ijms.2013.06.018. Green open access

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Abstract

The reactivity of O22+ with CO2, OCS and CS2 has been investigated for the first time, at centre-of-mass collision energies of 7.0, 7.9 and 8.5 eV, respectively. The position-sensitive coincidence technique we employ shows the reactivity in the three collision systems is dominated by double- and single-electron transfer. Analysis of the observed electron transfer reactivity indicates that the two-electron transfer is concerted and the translational energy does not couple efficiently to the electronic co-ordinates. In the O22+ + OCS collision system we observe a channel forming a new chemical bond, generating SO+ + CO+ + O. The angular scattering in this channel indicates that this reaction proceeds via complexation, then fragmentation of the complex to form SO2+ + CO+. The primary SO2+ product then dissociates to SO+ + O. Ab initio calculations support the presence of a collision complex in the pathway to SO+ + CO+ + O. The single-electron transfer reactions are direct and the energy releases we extract for the subsequent dissociation of the primary products (e.g. O2+ + CO2+) show that the internal vibrational energy of the O22+ reactant does not participate in the reaction.

Type: Article
Title: Reactions of O22+ with CO2, OCS and CS2
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.ijms.2013.06.018
Publisher version: http://dx.doi.org/10.1016/j.ijms.2013.06.018
Language: English
Additional information: © 2013 Elsevier B.V. except certain content provided by third parties. ScienceDirect® is a registered trademark of Elsevier B.V. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1399928
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