(SO2)-S-33 - INTERSTELLAR IDENTIFICATION AND LABORATORY MEASUREMENTS

The rotational spectrum of S-33 isotopically substituted sulfur dioxid e, (SO2)-S-33, has been measured up to nearly 1 THz. The combined anal ysis of these new data together with the published line frequencies re sulted in refined molecular constants, such as the rotational (A = 598 56.4723(62) MHz, B = 10318.3012(15) MHz, C = 8780.1363(15) MHz) and ce ntrifugal distortion constants which yielded precise frequency predict ions. The carrier of six previously unidentified interstellar lines in the Caltech molecular line survey in the 325-360 GHz band could be as signed to (SO2)-S-33. (C) 1997 Academic Press.