Chapter 18, Problem 3PP

Interpretation Introduction

Interpretation:

The mechanism for the epimerization of cis-declone to trans-declone, and the chair conformational structure that show trans-declone is more stable than cis-declone are to be drawn.

Concept introduction:

Keto and enol forms of carbonyl compounds are called constitutional isomers. Interconvertible keto and enol forms are called tautomers.

Racemization takes place at the $\alpha$ hydrogen in the presence of acids or bases.

Cis–trans isomers are known as configurational isomers. If two groups are present on the same side of the carbon double bond, the isomer is a cis-isomer. If two groups are present on the opposite side of the carbon double bond, the isomer is a trans-isomer.

Epimerization is the process by which less stable epimers are converted to more stable epimers.