Microwave Spectrum, Dipole Moment, and Conformation of Methyl Vinyl Sulfone

The microwave spectrum of methyl vinyl sulfone, CH 2CHSO 2CH 3, has been investigated in the frequency region 26.5 to 40 GHz. The assigned transitions are consistent with a conformation in which one of the SO bonds nearly eclipses the CC bond. This eclipsed conformer has been found to be at least...

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Bibliographic Details
Published in:Journal of molecular spectroscopy 1994-04, Vol.164 (2), p.319-327
Main Authors: Fantoni, A.C., Corbelli, G.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Conformation (statistics and dynamics)
Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility
Exact sciences and technology
Macromolecules and polymer molecules
Molecular properties and interactions with photons
Molecular spectra
Physics
Radio-frequency and microwave spectra
Rotation, vibration, and vibration-rotation constants
Studies of special atoms, molecules and their ions
clusters
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Summary:The microwave spectrum of methyl vinyl sulfone, CH 2CHSO 2CH 3, has been investigated in the frequency region 26.5 to 40 GHz. The assigned transitions are consistent with a conformation in which one of the SO bonds nearly eclipses the CC bond. This eclipsed conformer has been found to be at least 0.7 kcal/mole more stable than the s- cis form. From the second-order Stark effect measurements the electric dipole moment has been determined. A lower limit of 2800 cal/mole has been established for the V 3 barrier to the methyl group internal rotation.
ISSN:0022-2852
1096-083X
DOI:10.1006/jmsp.1994.1077