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The reactivity of methanimine radical cation (H2CNH•+) and its isomer aminomethylene (HCNH2•+) with C2H4
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. 777, article id 138677Article in journal (Refereed) Published
Abstract [en]

Experimental and theoretical studies are presented on the reactivity of H2CNH'+ (methanimine) and HCNH2'+ (aminomethylene) with ethene (C2H4). Selective isomer generation is performed via dissociative photoionization of suitable neutral precursors and reactive cross sections and branching ratios are measured as a function of photon and collision energies. Differences between isomers' reactivity are discussed in light of ab-initio calculations on reaction mechanisms. The main products, for both isomers, are H-elimination, most likely occurring from covalently bound adducts (giving c-CH2CH2CHNH+/CH2NHCHCH2+) and H' atom transfer to yield H2CNH2+. The astrochemical implications of the results are briefly addressed.

Place, publisher, year, edition, pages
2021. Vol. 777, article id 138677
Keywords [en]
Interstellar medium, Rate constant, Astrochemistry molecular astrophysics, Isomerism, Protonated ketenimine, Ion-molecule reactions, Titan's atmosphere
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-195958DOI: 10.1016/j.cplett.2021.138677ISI: 000662693000004Scopus ID: 2-s2.0-85106251513OAI: oai:DiVA.org:su-195958DiVA, id: diva2:1588801
Available from: 2021-08-30 Created: 2021-08-30 Last updated: 2022-11-11Bibliographically approved

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Sundelin, DavidRichardson, V.Polášek, M.Tosi, P.Geppert, Wolf

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