Optical rotatory dispersion and circular dichroism. Part LXXXVI. Acetates and acetamides

Abstract

C.d. curves have been recorded for about seventy secondary acetates and acetamides. Data for compounds in which the acetoxy- or acetamido-group is a substituent on a cyclohexane ring have been analysed on the assumptions (a) that the substituent has a strongly prefeered conformation in solution and (b) that the contributions δ(Δε) of individual C–C bonds in the vicinity of the chromophore are additive. The results substantially confirm these assumptions and appear to suggest the position of a nodal surface of the acetoxy- or acetamido-chromophore.