THE CONFORMATIONS OF THE DIASTEREOMERIC 2,5-DIMETHYL-2,5-DIMETHOXY-3,4-DIPHENYLHEXANES
1959; NRC Research Press; Volume: 37; Issue: 7 Linguagem: Inglês
10.1139/v59-168
ISSN1480-3291
AutoresH Sawatzky, George K. White, George F Wright,
Tópico(s)Molecular Spectroscopy and Structure
ResumoThe electric dipole moments of six possible rotamers comprising the two diastereomeric forms of 2,5-dimethyl-2,5-dimethoxy-3,4-diphenylhexane have been calculated vectorially. Comparison of these values with the experimental determination of polarization in benzene and carbon tetrachloride shows that only two of the rotamers of the dd,ll form and only one of the meso form are present in significant amount. The moment of the dd,ll diastereomer decreases with increasing temperature but that of the meso form is almost invariant. It is probable that all six central linkages in these diastereomers are hindered from free rotation.
Referência(s)