MICROWAVE SPECTRUM OF meso-BISOXIRANE
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Date
1989
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The microwave spectrum of meso-bisoxirane has been recorded in the R-band, K-band, and X-band regions. Vibrational spectra of the gas, liquid, and solid phases indicate that the compound exists as a mixture of two conformations, but the more stable trans conformation ($C_{1}$ symmetry) has no dipole moment. Therefore, the very weak microwave spectrum was assigned to the gauche conformer ($C_{1}$ symmetry), and RF-MW double resonance was necessary to confirm some assignments. The following rotational constants (MHz) and dipole moment components (D) have been obtained: $\begin{array}{cc}A = 9187.45 & \mu_{a} = 1.08\\ B = 2651.80 & \mu_{b} = 0.35\\ C = 2608.92 & \mu_{c} = 2.80\end{array}$ A structure for meso-bisoxirane which is consistent with these data has been determined and will be discussed with regard to the structures and conformational stabilities of the related compounds d,l-bisoxirane and bicyclopropyl.
Description
Author Institution: Department of Physics and Astronomy, Mississippi State University; Department of Chemistry, Mississippi State University