✦ LIBER ✦

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

✍ Scribed by A.C. Fantoni; G. Corbelli

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 366 KB
Volume: 164
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.1994.1077

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✦ Synopsis

The microwave spectrum of methyl vinyl sulfone, (\mathrm{CH}{2} \mathrm{CHSO}{2} \mathrm{CH}{3}), has been investigated in the frequency region 26.5 to (40 \mathrm{GHz}). The assigned transitions are consistent with a conformation in which one of the (\mathrm{S}=\mathrm{O}) bonds nearly eclipses the (\mathrm{C}=\mathrm{C}) bond. This eclipsed conformer has been found to be at least (0.7 \mathrm{kcal} / \mathrm{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. (c) 1994 Academic Press. Inc.

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