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.

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DOI (Digital Object Identifier) Link:	http://dx.doi.org/doi:10.1039/c004467a
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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.

Item Type:	Journal Article
Copyright Holders:	2010 the Owner Societies
ISSN:	1463-9076
Academic Unit/Department:	Science > Physical Sciences
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID:	23829
Depositing User:	Astrid Peterkin
Date Deposited:	19 Oct 2010 12:20
Last Modified:	17 Nov 2012 09:46
URI:	http://oro.open.ac.uk/id/eprint/23829

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