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(C) The structure of $3-$ethylpentan$-3-$ol is $(CH_3CH_2)_3C-OH$.This is a tertiary alcohol. Grignard reagents react with ketones to form tertiary al

Vedclass · Accepted Answer

$CH_3CH_2MgBr + CH_3CH_2COCH_2CH_3$

Vedclass · Answer

(C) The structure of $3-$ethylpentan$-3-$ol is $(CH_3CH_2)_3C-OH$.This is a tertiary alcohol. Grignard reagents react with ketones to form tertiary alcohols.To obtain $(CH_3CH_2)_3C-OH$,we need a ketone and a Grignard reagent that provide the three ethyl groups attached to the central carbon.Specifically,the reaction between diethyl ketone (pentan$-3-$one) and ethylmagnesium bromide is:$CH_3CH_2COCH_2CH_3 + CH_3CH_2MgBr \rightarrow (CH_3CH_2)_3C-OMgBr$Followed by acid hydrolysis:$(CH_3CH_2)_3C-OMgBr + H_2O \rightarrow (CH_3CH_2)_3C-OH + Mg(OH)Br$Thus,the correct reagents are $CH_3CH_2MgBr$ and $CH_3CH_2COCH_2CH_3$.

Which of the following reagents are required to prepare $3-$ethylpentan$-3-$ol?

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