The enol form in which ethyl 3-oxobutanoate e | vedclass

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Question

(D) Ethyl $3$-oxobutanoate (also known as ethyl acetoacetate) exists in keto-enol tautomerism. The enol form is stabilized by intramolecular hydrogen

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(D) Ethyl $3$-oxobutanoate (also known as ethyl acetoacetate) exists in keto-enol tautomerism. The enol form is stabilized by intramolecular hydrogen bonding between the hydroxyl group and the carbonyl oxygen of the ester group. The keto form is $CH_3COCH_2COOC_2H_5$. The enol form is $CH_3C(OH)=CHCOOC_2H_5$, which forms a stable six-membered ring due to hydrogen bonding.

The enol form in which ethyl $3$-oxobutanoate exists is

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