THE MICROWAVE TORSIONAL ROTATIONAL SPECTRA OF CH2DSH AND CHD2SH, REVISITED

The microwave spectroscopy of CH2DSH and CHD2SH has been revisited with the intent of identifying and assigning transitions in the excited torsional states. This effort has been successful, but in the course of the investigation it has been necessary to assign additional ground state lines. A preliminary analysis shows that V3 is much closer to the -CH3 value of 444 cm-1 for both partially deuterated species than our study of many years ago indicated. Further, the preliminary analysis indicates that the sign of V1 has changed for CHD2SH and is now consistent with that for CHD2OH. A large V2 term of opposite sign keeps the trans level below the gauche levels. The determination of a good, full set of potential energy coefficients will have to await a more rigorous analysis. © 1993 Academic Press, Inc.