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Rotational Spectroscopy of HB33S: The Quadrupole Coupling Constant of 33S in Thioborine

✍ Scribed by L Bizzocchi; C.Degli Esposti; L Dore

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
132 KB
Volume
215
Category
Article
ISSN
0022-2852

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✦ Synopsis

The unstable HBS molecule has been produced in the gas phase by a high-temperature reaction between crystalline boron and hydrogen sulfide. Ground state rotational spectra have been observed in the millimeter-wave region, from 75 to 460 GHz, for the previously unobserved H 11 B 33 S and H 10 B 33 S isotopic species. The analysis of the hyperfine structure produced by the 10/11 B and 33 S nuclear spins in the low-J rotational transitions has yielded the first evaluation of the quadrupole coupling constant of 33 S in the thioborine molecule, which was 6.361(15) MHz in H 11 B 33 S and 6.329(17) MHz in H 10 B 33 S. In addition, further measurements have been performed for the most abundant isotopomers H 10/11 B 32/34 S, for which improved values of rotational, centrifugal, and hyperfine structure constants have been determined.

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