Chapter 11, Problem 11.31P

Interpretation Introduction

Interpretation: The two possible enols for $\text{but}-2-\text{one}$ $\left({\text{CH}}_{\text{3}}{\text{COCH}}_{\text{2}}{\text{CH}}_{\text{3}}\right)$ are to be drawn. The most stable enol among the two enols is to be predicted.

Concept Introduction: The chemical equilibrium that exists between a keto form of a compound and an enol form of the same compound is known as keto-enol tautomerism. Tautomers refer to these keto and enol forms. The aldehydic and ketonic forms undergo keto-enol tautomerism.