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The reactivity of methanimine radical cation (H2CNH.+) and its isomer aminomethylene (HCNH2.+) with methane
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 102021 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 775, article id 138611Article in journal (Refereed) Published
Abstract [en]

Experimental and theoretical studies are presented on the reactions of the isomeric radical cations H2CNH+ and HCNH2+ with CH4. Ionic isomers were generated selectively by VUV dissociative photoionization of azetidine and cyclopropylamine precursors respectively. Both exclusively give H2CNH2+ plus CH3 as products, but differences are observed related to a competition between stripping and complex-mediated H-transfer. Astrochemical implications for Titan’s atmosphere are briefly discussed, where the presence of methanimine (H2CNH), a key prebiotic molecule and a potential precursor for tholins, is proposed on the basis of atmospheric models and the observation of CH2NH2+ ions in Cassini mass spectrometric data.

Place, publisher, year, edition, pages
2021. Vol. 775, article id 138611
Keywords [en]
Interstellar medium, Rate constants, Ion-molecule reactions, Astrochemistry, Molecular astrophysics, Titan's atmosphere, Methane activation, Isomer, Methanimine, Aminomethylene
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-195709DOI: 10.1016/j.cplett.2021.138611ISI: 000656477200002Scopus ID: 2-s2.0-85104947990OAI: oai:DiVA.org:su-195709DiVA, id: diva2:1587685
Available from: 2021-08-25 Created: 2021-08-25 Last updated: 2022-11-11Bibliographically approved

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Geppert, WolfPolášek, M.Sundelin, DavidTosi, P.Ascenzi, D.

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