The reaction of butanal with n-propylmagnesiu | vedclass

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(B) The reaction of butanal $(CH_3CH_2CH_2CHO)$ with $n$-propylmagnesium bromide $(CH_3CH_2CH_2MgBr)$ is a nucleophilic addition reaction.First,the Gr

Vedclass · Accepted Answer

achiral secondary alcohol

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(B) The reaction of butanal $(CH_3CH_2CH_2CHO)$ with $n$-propylmagnesium bromide $(CH_3CH_2CH_2MgBr)$ is a nucleophilic addition reaction.First,the Grignard reagent attacks the carbonyl carbon of butanal to form an alkoxide intermediate.Upon acidic hydrolysis $(H_3O^+)$,this intermediate yields heptan-$4$-ol $(CH_3CH_2CH_2CH(OH)CH_2CH_2CH_3)$.In heptan-$4$-ol,the central carbon atom is bonded to two identical $n$-propyl groups $(-CH_2CH_2CH_3)$ and one hydrogen atom and one hydroxyl group.Since the central carbon is bonded to two identical groups,it is not a chiral center.Therefore,the product is an achiral secondary alcohol.Thus,the correct option is $(b)$.

The reaction of butanal with $n$-propylmagnesium bromide gives a

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