Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confete10l&link_type=abstract
"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec
Astronomy and Astrophysics
Astronomy
Radicals And Ions
Scientific paper
By means of Fabry-Pérot FT microwave spectroscopy, the rotational spectrum of protonated sulfur dioxide in two distinct isomeric forms, a cis and a trans geometry, is reported. Searches for both isomers were based on theoretical structures obtained at the CCSD(T)/cc-pwCVQZ level of theory corrected for zero-point vibrational effects at the CCSD(T)/cc-pV(T+d)Z level. At a similarly high level of theory, the cis isomer is calculated to be the global minimum on the potential energy surface, but the trans isomer is predicted to lie only a few kcal/mol higher in energy. The identification of cis HOSO^+ has been confirmed by detection of rotational lines of DOSO^+ and HO^{34}SO^+ at precisely the expected frequency shifts. Because sulfur dioxide is a well known interstellar and extragalactic species, and because it possesses a large proton affinity, HOSO^+ is a excellent candidate for radioastronomical detection.
Lattanzi Valerio
McCarthy Mary C.
Thaddeus Patrick
Thorwirth Sven
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