The conformational equilibria of trans-1,4-dibromo- (I), trans-1,4-dichloro- (II), and trans-1,4-bromochloro-cyclohexane (III) were determined by integration of the separate axial and equatorial proton signals at low temperature. The [Formula: see text] values for compounds I, II, and III were found to be approximately 200 cal/mole.
Conformational Analysis. I. The Molecular Structure, Torsional Oscillations, and Conformational Equilibria of Gaseous 1,2,3-Tribromopropane as Determined by Electron Diffraction and Compared with Semiempirical Calculations.