Negative ion formation in potassium–nitromethane collisions

Antunes, R.; Almeida, D.; Martins, G.; Mason, N. J.; Garcia, G.; Maneira, M. J. P.; Nunes, Y. and Limão-Vieira, P. (2010). Negative ion formation in potassium–nitromethane collisions. Physical Chemistry Chemical Physics, 12(39) pp. 12513–12519.

DOI: https://doi.org/10.1039/c004467a

Abstract

Ion-pair formation in gaseous nitromethane (CH₃NO₂) induced by electron transfer has been studied by investigating the products of collisions between fast potassium atoms and nitromethane molecules using a crossed molecular-beam technique. The negative ions formed in such collisions were analysed using time-of-flight mass spectroscopy. The six most dominant product anions are NO₂^?, O^?, CH₃NO₂^?, OH^?, CH₂NO₂^? and CNO^?. By using nitromethane-d₃ (CD₃NO₂), we found that previous mass 17 amu assignment to O^? delayed fragment, is in the present experiment may be unambiguously assigned to OH^?. The formation of CH₂NO₂^? may be explained in terms of dissociative electron attachment to highly vibrationally excited molecules.

Viewing alternatives

Metrics

Item Actions

Export

You can export this page using these formats Digital Object Identifier - DOI