Laboratory Studies on the Infrared Absorptions of Hydrogenated Carbon-Silicon Clusters: Directing the Identification of Organometallic SiCHx Species toward IRC +10216

Details Laboratory Studies on the Infrared Absorptions of Hydrogenated Carbon-Silicon Clusters: Directing the Identification of Organometallic SiCHx Species toward IRC +10216 Laboratory Studies on the Infrared Absorptions of Hydrogenated Carbon-Silicon Clusters: Directing the Identification of Organometallic SiCHx Species toward IRC +10216

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...630.1217k&link_type=abstract

The Astrophysical Journal, Volume 630, Issue 2, pp. 1217-1223.

Astronomy and Astrophysics

Astronomy

3

Astrochemistry, Ism: Molecules, Methods: Laboratory, Molecular Processes

Scientific paper

Silicon-bearing species of the molecular formula SiCHx (x=1-6) are plausible candidates for organometallic molecules that might be present in the circumstellar envelope of IRC +10216. Combining matrix-isolation laboratory experiments with computed vibrational spectra of these molecules, we have observed several fundamentals of the new silicon-containing radicals SiCH3 and SiCH5, in addition to the well-known SiCH4 and SiCH6 species, via infrared spectroscopy. These bands can now be used to search for hydrogen-deficient silicon-carbon-carrying molecules in the circumstellar envelope of the carbon star IRC +10216; the column densities of these species will yield valuable clues to the formation of silicon carbide molecules (SiC), together with their aggregates and partially hydrogenated clusters in the interstellar medium.

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