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(A) The dehydration of alcohols under acidic conditions proceeds via the formation of a carbocation intermediate.For the dehydration to occur most rea

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$4-$Hydroxypentan$-2-$one

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(A) The dehydration of alcohols under acidic conditions proceeds via the formation of a carbocation intermediate.For the dehydration to occur most readily,the resulting alkene should be stabilized by conjugation with a carbonyl group (forming an $\alpha, \beta-$unsaturated ketone).In $4-$hydroxypentan$-2-$one $(CH_3-CH(OH)-CH_2-CO-CH_3)$,the hydroxyl group is at the $\beta-$position relative to the carbonyl group.Upon protonation and loss of water,it forms a carbocation that is stabilized by the adjacent carbonyl group,leading to the formation of a conjugated $\alpha, \beta-$unsaturated ketone $(CH_3-CH=CH-CO-CH_3)$.This process is highly favorable due to the formation of a conjugated system,making $4-$hydroxypentan$-2-$one the most readily dehydrated compound among the choices.

Which of the following compounds will most readily be dehydrated to give an alkene under acidic conditions?

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