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Anions in Space and in the Laboratory

Published online by Cambridge University Press:  21 December 2011

Veronica M. Bierbaum
Veronica M. Bierbaum*
Affiliation:
Department of Chemistry and Biochemistry, Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, Colorado 80309-0215 email: [email protected]
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Abstract

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The astronomical detection of molecular anions has prompted our study of their chemical reactions with atomic species that are abundant in the interstellar medium. We have recently explored the chemistry of a variety of Cx Ny− anions with hydrogen atoms and determined their reaction rate constants and products using the flowing afterglow-selected ion flow tube technique. Computational studies allow characterization of the structures of reactants and products, as well as the energetics along the reaction pathway. For anions containing one or two nitrogen atoms, reactions with hydrogen atoms are facile, and proceed primarily by associative detachment. In contrast, anions containing three nitrogen atoms are unreactive with hydrogen atoms due to reaction barriers and unfavorable thermodynamics.

Keywords

Negative ionsgas phase reactionsassociative detachmentreaction rate constantsflowing afterglow-selected ion flow tube
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S280: The Molecular Universe , June 2011 , pp. 383 - 389
Copyright
Copyright © International Astronomical Union 2011

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