VIBRATIONAL SPECTRA OF 1,1-DIBROMO-2,2-DICHLOROCYCLOPROPANE
Loading...
Date
1978
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Infrared $(400-200\,cm^{-1})$ and Raman spectra of 1,1-dibromo-2,2-dichlorocyclopropane (DBDCCP) have been recorded for the first time. These spectral data are consistent with the expected $C_{s}$ structure of this molecule. In most cyclopropyl derivatives containing only a plane of symmetry, the plane is perpendicular to the ring plane; in DBDCCP, however, the symmetry plane is the ring plane. This fact leads to all three ring modes being totally symmetric vibrations. Additionally, the $CH_{2}$ rock and wag end up in uncharacteristic symmetry blocks. A vibrational assignment for the 21 normal modes of DBDCCP has been proposed and these results are compared to the vibrational spectra of 1,1,2,2-tetrabromocyclopropane and 1,1,2,2-tetrachlorocyclopropane (for which two molecules DBDCCP represents an ``averageā structure).
Description
Author Institution: Department of Chemistry, University of Missouri