Change search
ReferencesLink to record
Permanent link

Direct link
Is the Reaction of C3N- with C2H2 a Possible Process for Chain Elongation in Titan's Ionosphere?
Stockholm University, Faculty of Science, Department of Physics.
Show others and affiliations
Number of Authors: 11
2016 (English)In: Journal of Physical Chemistry A, ISSN 1089-5639, E-ISSN 1520-5215, Vol. 120, no 27, 5337-5347 p.Article in journal (Refereed) Published
Abstract [en]

The reaction of C3N- with acetylene was studied using three different experimental setups, a triple quadrupole mass spectrometer (Trento), a tandem quadrupole mass spectrometer (Prague), and the CERISES guided ion beam apparatus at Orsay. The process is of astrophysical interest because it can function as a chain elongation mechanism to produce larger anions that have been detected in Titan's ionosphere by the Cassini Plasma Spectrometer. Three major products of primary processes, C2H-, CN-, and C5N-, have been identified, whereby the production of the cyanide anion is probably partly due to collisional induced dissociation. The formations of all these products show considerable reaction thresholds and also display comparatively small cross sections. Also, no strong signals of anionic products for collision energies lower than 1 eV have been observed. Ab initio calculations have been performed to identify possible pathways leading to the observed products of the title reaction and to elucidate the thermodynamics of these processes. Although the productions of CN- and C5N- are exoergic, all reaction pathways have considerable barriers. Overall, the results of these computations are in agreement with the observed reaction thresholds. Due to the existence of considerable reaction enenrgy barriers and the small observed cross sections, the title reaction is not very likely to play major role in the buildup of large anions in cold environments like the interstellar medium or planetary and satellite ionospheres.

Place, publisher, year, edition, pages
2016. Vol. 120, no 27, 5337-5347 p.
National Category
Chemical Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-133397DOI: 10.1021/acs.jpca.6b01746ISI: 000379988900083PubMedID: 27135984OAI: oai:DiVA.org:su-133397DiVA: diva2:958245
Available from: 2016-09-06 Created: 2016-09-06 Last updated: 2016-09-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Lindén, FredrikGeppert, Wolf D.
By organisation
Department of Physics
In the same journal
Journal of Physical Chemistry A
Chemical SciencesPhysical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link