Rotational Isomerism and the Vibrational Spectrum of Sym-Dideuterodibromoethane

Abstract
Trans‐ethylene‐d2 was brominated by two methods, which involved different stereochemical paths, to give 95 percent meso‐BrDHC‐CHDBr as one product and a mixture of meso‐ and racemic‐BrDHC‐CHDBr as the other. Liquid phase Raman spectra and liquid and solid phase infrared spectra of these materials have been obtained and a tentative assignment of the vibrational frequencies of BrDHC‐CHDBr to the trans and skew configurations of the meso and racemic compounds has been made.