# THE MICROWAVE SPECTRA OF THE TRIMETHYLAMINE-$SO_{2}$ AND PYRIDINE-$SO_{2}$ DIMERS

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 Title: THE MICROWAVE SPECTRA OF THE TRIMETHYLAMINE-$SO_{2}$ AND PYRIDINE-$SO_{2}$ DIMERS Creators: Oh, J. J.; Labarge, M. S.; Matos, J.; Hillig, K. W., II; Kuczkowski, R. L. Issue Date: 1989 Publisher: Ohio State University Abstract: The rotational spectra of TMA-$SO_{2}$ and $C_{5}H_{5}N-SO_{2}$ have been observed in a FTMW spectrometer. Twenty-five a and c dipole transitions have been assigned for the TMA-$SO_{2}$ charge transfer complex. The $C_{3}$ axis of the TMA points toward the sulfur atom and makes an angle of $101^{\circ}$ with the $SO_{2}$ plane. The N-S distance is 2.28(3) {\AA}. The dipole moment of the complex is 4.80(4) D. Forty-one a and c dipole transitions have been assigned for the pyridine-$SO_{2}$ dimer. Two structures fit the rotational constants. The most likely structure is similar to TMA-$SO_{2}$ with the nitrogen end of the pyridine pointing at the sulfur atom. The pyridine and $SO_{2}$ planes are approximately perpendicular and the N-S distance is 2.54(3) {\AA}. The dipole moment is 4.81(3) D. No evidence for internal rotation or tunneling has been observed for either complex. Description: Author Institution: Department of Chemistry, University of Michigan URI: http://hdl.handle.net/1811/17989 Other Identifiers: 1989-TF-6