Which of the following has an unstable enol f | vedclass

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(C) The stability of an enol form is often determined by factors such as aromaticity,conjugation,and ring strain. In the case of cyclobutenone,the eno

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Cyclobutenone

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(C) The stability of an enol form is often determined by factors such as aromaticity,conjugation,and ring strain. In the case of cyclobutenone,the enol form would be cyclobuta$-1,3-$dien$-1-$ol. This enol form contains a $4\pi$ electron system in a planar cyclic ring,which makes it anti-aromatic. Anti-aromatic compounds are highly unstable compared to their keto forms. Therefore,cyclobutenone has an unstable enol form.

Which of the following has an unstable enol form?

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