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Issue 39, 2010
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Negative ion formation in potassium–nitromethane collisions

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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.

Graphical abstract: Negative ion formation in potassium–nitromethane collisions

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Publication details

The article was received on 18 Mar 2010, accepted on 29 Jun 2010 and first published on 19 Aug 2010


Article type: Paper
DOI: 10.1039/C004467A
Phys. Chem. Chem. Phys., 2010,12, 12513-12519

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    Negative ion formation in potassiumnitromethane collisions

    R. Antunes, D. Almeida, G. Martins, N. J. Mason, G. Garcia, M. J. P. Maneira, Y. Nunes and P. Limão-Vieira, Phys. Chem. Chem. Phys., 2010, 12, 12513
    DOI: 10.1039/C004467A

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