{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T23:11:37Z","timestamp":1774307497352,"version":"3.50.1"},"reference-count":61,"publisher":"AIP Publishing","issue":"23","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2009,6,21]]},"abstract":"<jats:p>The rotational spectrum of protonated carbon disulfide, HSCS+, has 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 ten transitions in the Ka=0 ladder of the normal isotopic species, HS13CS+, and DSCS+. The present assignment agrees well with high-level coupled cluster calculations of the HSCS+ structure, which, like earlier work, predict this isomer to be the ground state on the HCS2+ potential energy surface; HCSS+, an isomer with C2v symmetry, is predicted to lie more than 20 kcal\/mol higher in energy. Other properties of HSCS+ including its dipole moment, anharmonic vibrational frequencies, and infrared intensities have also been computed at the coupled cluster level of theory with large basis sets. Because carbon disulfide possesses a fairly large proton affinity, and because this nonpolar molecule may plausibly exist in astronomical sources, HSCS+ is a good candidate for detection with radio telescopes in the submillimeter band where the stronger b-type transitions of this protonated cation are predicted to lie.<\/jats:p>","DOI":"10.1063\/1.3137057","type":"journal-article","created":{"date-parts":[[2009,6,16]],"date-time":"2009-06-16T22:52:22Z","timestamp":1245192742000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":15,"title":["A laboratory and theoretical study of protonated carbon disulfide, HSCS+"],"prefix":"10.1063","volume":"130","author":[{"given":"M. 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