Question

Which of the following compounds has the highest enol content?

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

Keto form is more stable than enol form because $C-O$ double bond is stronger than $C-C$ double bond.


a) Enol form is antiaromatic. Hence it has a major keto content.


b) Enol form is aromatic. Hence it has the highest enol content.


c) The enol form does not have any stabilization. Hence it has a higher keto content.


d) The enol form is antiaromatic and hence tends to remain as the keto form.