Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7605291 | International Journal of Mass Spectrometry | 2013 | 7 Pages |
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 8.5Â 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+Â +Â OCS collision system we observe a channel forming a new chemical bond, generating SO+Â +Â CO+Â +Â O. The angular scattering in this channel indicates that this reaction proceeds via complexation, then fragmentation of the complex to form SO2+Â +Â CO+. The primary SO2+ product then dissociates to SO+Â +Â O. Ab initio calculations support the presence of a collision complex in the pathway to SO+Â +Â CO+Â +Â 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+Â +Â CO2+) show that the internal vibrational energy of the O22+ reactant does not participate in the reaction.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Michael A. Parkes, Jessica F. Lockyear, Stephen D. Price,