Optical rotatory dispersion studies. 137. Synthesis and chiroptical properties of .alpha.- and .beta.-deuterium substituted aliphatic aldehydes and ketones
Optical rotatory dispersion studies. 137. Synthesis and chiroptical properties of .alpha.- and .beta.-deuterium substituted aliphatic aldehydes and ketones
only two conformations. Substituents have been varied in order to find those which lead to a strong preference of the conformer equilibrium. Studying 2-substituted 4-methylpentanes 3 and 4-benzyloxypentanes 12, it has been shown that substituent effects on the conformer equilibria are not additive, as would be expected on the grounds of steric effects alone. Rather, interactions between polar groups