MICROWAVE SPECTRAL STUDY OF THE ENDO AND EXO ISOMERS OF 2-METHYL BICYCLO [2.1.0] PENTANE
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Date
1975
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Ohio State University
Abstract
Although the existence of endo and exo isomers of 2-methyl-bicyclo[2.1.0]pentane has been known for several years, positive identification of the species (which are easily separated chromatographically) had not been $achieved.^{1}$ We have succeeded in observing and analyzing the microwave spectra of these molecules and have made the correct isomeric assignments. Rotational constants (in MHz) for the endo and exo isomers are: A = 6257.36, B = 3412.19, C = 2843.34; and A = 7418.75, B = 3101.66, C = 2652.57, respectively. Dipole moment components have been determined for each of the two isomers by means of Start effect measurements. These results will be interpreted in accordance with the structure and dipole moment values for the parent bicyclic species.
Description
$^{1}$ K.B. Wiberg, private communication.""
Author Institution: Department of Chemistry, The University of Kansas
Author Institution: Department of Chemistry, The University of Kansas