Knowledge Bank

A great many lines of the rotational spectra of $(CH3)2S2$ and $(CD3)2S2$ have been measured and assigned in the region from 5.5 to 32 kmc. The difficult assignment of the b-type transitions was accomplished by using the information obtained first from Q-branch lines of $(CD3)2S2$ and later of $(CH3)2S2$. The most unreliable parameters of the molecular model could thus be consecutively corrected. Finally a $r0$-structure was calculated from the six rotational constants. The dipole moment and the potential hindering the $CH3$-torsion have been determined.