PSEUDOROTATION OF CYCLOPENTANE AND ITS DEUTERATED DERIVATIVES

Abstract

The pseudorotation combination bands of cyclopentane near $1460 cm^{-1}$ have been reexamined at high resolution ($0.1 cm^{-1}$). Similar spectra have also been obtained for the $d_{1}$ and $d_{10}$ derivatives. The specings between adjacent combination bands are approximately 5.3, 5.0, and $3.9 cm^{-1}$ for the three compounds. Spectra for cyclopentane-$1,1-d_{2}$ and $1,1,2,2,3,3-d_{6}$ have also been examined. The effect on the spectra of a ten-fold pseudorotational barrier will be considered.