Reactivity of C2H5+ with Benzene: Formation of Ethylbenzenium Ions and Implications for Titan's Ionospheric Chemistry

0333715 - ÚFCH JH 2010 RIV US eng J - Článek v odborném periodiku
Žabka, Ján - Polášek, Miroslav - Ascenzi, D. - Tosi, P. - Roithová, Jana - Schröder, Detlef
Reactivity of C2H5+ with Benzene: Formation of Ethylbenzenium Ions and Implications for Titan's Ionospheric Chemistry.
Journal of Physical Chemistry A. Roč. 113, č. 42 (2009), s. 11153-11160. ISSN 1089-5639. E-ISSN 1520-5215
Grant CEP: GA AV ČR IAA400400702; GA ČR GA203/09/1223
Výzkumný záměr: CEZ:AV0Z40400503; CEZ:AV0Z40550506
Klíčová slova: gas phase * alkylbenzenium ions * molecule reactions
Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
Impakt faktor: 2.899, rok: 2009

The reaction of ethyl cation with benzene ha's been investigated in a combined experimental and theoretical approach. Under single collision conditions, proton transfer affording protonated benzene concomitant with neutral ethene represents the major reaction channel. From pressure-dependent measurements, an absolute cross section of 7 +/- 2 angstrom(2) at hyperthermal energies (about 1.0 eV in the center of mass frame) is derived for this channel, from which a phenomenological rate constant of about 2.9 x 10(-10) cm(3) s(-1) is estimated at low energies. The energy behavior of the cross section as well as several side reactions leading to C-C coupling imply that the reaction Of C2H5+ with CA proceeds via a long-lived association product, presumably the covalently bound protonated ethylbenzene (ethylbenzenium ion).
Trvalý link: http://hdl.handle.net/11104/0005574