The reactivity of methanimine radical cation (H2CNH•+) and its isomer aminomethylene (HCNH2•+) with C2H4

0543202 - ÚFCH JH 2022 RIV NL eng J - Článek v odborném periodiku
Sundelin, D. - Ascenzi, D. - Richardson, V. - Alcaraz, C. - Polášek, Miroslav - Romanzin, C. - Thissen, R. - Tosi, P. - Žabka, Ján - Geppert, W. D.
The reactivity of methanimine radical cation (H2CNH•+) and its isomer aminomethylene (HCNH2•+) with C2H4.
Chemical Physics Letters. Roč. 777, AUG 2021 (2021), č. článku 138677. ISSN 0009-2614. E-ISSN 1873-4448
Grant CEP: GA MŠMT(CZ) LTC20062
Institucionální podpora: RVO:61388955
Klíčová slova: Astrochemistry molecular astrophysics * Interstellar medium * Ion–molecule reactions * Isomerism * Protonated ketenimine * Rate constant * Titan's atmosphere
Obor OECD: Physical chemistry
Impakt faktor: 2.719, rok: 2021
Způsob publikování: Omezený přístup

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.
Trvalý link: http://hdl.handle.net/11104/0320472