# MICROWAVE SPECTRUM OF TRIMETHYLENE SULFIDE

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 Title: MICROWAVE SPECTRUM OF TRIMETHYLENE SULFIDE Creators: Sont, W. N.; Wieser, H. Issue Date: 1977 Publisher: Ohio State University Abstract: About 200 microwave lines of trimethylene sulfide, in addition to those reported $earlier,^{1}$ have been measured and assigned to R and Q type transitions in six ring puckering states. For the $v_{p} = 4$ and 5 levels lying above the inversion barrier the observed spectra are fitted to an effective Hamiltonian which includes the five quartic and a few sextic centrifugal distortion constants in the Watson formulation. The two close-lying pairs of puckering states below the barrier ($v_{p} = 0$, 1 and $v_{p} = 2,3$) require a vibrational-rotational Hamiltonian which includes simultaneously both states coupled by an off-diagonal interaction term in addition to the five quartic constants. Description: $^{1}$ D. O. Harris, H. W. Harrington, A. C. Luntz and W. D. Gwinn, J. Chem. Phys. 44, 3467 (1966). Author Institution: Department of Chemistry, The University of Calgary URI: http://hdl.handle.net/1811/10281 Other Identifiers: 1977-TG-9