Physics – Chemical Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jchph.127v1104m&link_type=abstract
Journal of Chemical Physics, Volume 127, Issue 22, pp. 221104-221104-4 (2007).
Physics
Chemical Physics
5
Rotation, Vibration, And Vibration-Rotation Constants, Rotational Analysis, Radio-Frequency And Microwave Spectra, General Molecular Conformation And Symmetry, Stereochemistry
Scientific paper
The rotational spectrum of protonated carbonyl sulfide, HSCO+, has now been detected in the centimeter-wave band in a molecular beam by Fourier transform microwave spectroscopy. Rotational and centrifugal distortion constants have been determined from transitions in the Ka=0 ladder of the normal isotopic species, and DSCO+ and H34SCO+. HSCO+ is systematically more abundant by a factor of three than HOCS+, the isomer obtained by attaching the H+ to the other end of the molecule, which ab initio calculations long predicted to be higher in energy by 4-5 kcal/mol. Because HSCO+ is comparable in polarity to HOCS+ and is apparently more stable and because OCS is widely distributed in astronomical sources, HSCO+ is a good candidate for detection with radio telescopes.
McCarthy Mary C.
Thaddeus Patrick
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