Astronomy and Astrophysics – Astronomy
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.187..441f&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 187, May 1979, p. 441-444.
Astronomy and Astrophysics
Astronomy
12
Acetylene, Cyano Compounds, Cyanoacetylene, Hydrogen Clouds, Interstellar Chemistry, Interstellar Gas, Chemical Reactions, Ionic Reactions, Molecular Interactions
Scientific paper
Rate coefficients from laboratory measurements at 300 K are reported for reactions of cyanoacetylene, HC3N, with 18 ions of interstellar significance. Reactions between HC3N and ions of the type YH+ were found to be exclusively proton transfer except in the case where Y = NH3 where no reaction occurred. These observations limit the proton affinity of HC3N to the range between 824 and 866 kJ/mol. Reactions between HC3N and ions with non-transferable protons, Y+, were exclusively charge transfer with rate coefficients in most cases exceeding the predictions of the simple polarization and orientated dipole models. A further consequence of the high proton affinity of HC3N is that HC5N will not be formed from HC3N via the reaction C2H3+ + HC3N → H2C5N+ + H2.
Freeman Colin G.
Harland P. W.
McEwan Murray J.
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