Question

In keto-enol tautomerism of dicarbonyl compounds, the enol-form is preferred in contrast to the keto-form, this is due to

• A. presence of carbonyl group on each side of \( \text{C} = C \) group
• B. resonance stabilization of enol form
• C. presence of methylene group
• D. rapid chemical exchange

Hint:

Enol forms are stabilized by resonance, which makes them more favored in some tautomeric equilibria.

Answer 1

The Correct Option is B

In keto-enol tautomerism, the enol form is stabilized by resonance between the lone pair of electrons on oxygen and the C=C bond. This makes the enol form more stable than the keto form, which lacks this resonance stabilization.