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(A) The final product is $3,4-	ext{dimethylhexan-3-ol}$. This is a tertiary alcohol formed by the reaction of a Grignard reagent with a ketone.Let th

Vedclass · Accepted Answer

Butan$-2-$ol

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(A) The final product is $3,4-	ext{dimethylhexan-3-ol}$. This is a tertiary alcohol formed by the reaction of a Grignard reagent with a ketone.Let the Grignard reagent be $R-MgBr$ and the ketone be $R'-CO-R''$.From the reaction sequence,$(A)$ is a secondary alcohol that is oxidized to a ketone $(B)$ and also converted to a Grignard reagent via an alkyl bromide $(C)$.If $(A)$ is $butan-2-ol$ $(CH_3-CH(OH)-CH_2-CH_3)$:$1$. Oxidation of $butan-2-ol$ gives $butanone$ $(CH_3-CO-CH_2-CH_3)$ as $(B)$.$2$. Conversion of $butan-2-ol$ to $2-bromobutane$ $(CH_3-CH(Br)-CH_2-CH_3)$ and then to the Grignard reagent $sec-butylmagnesium$ bromide $(CH_3-CH(MgBr)-CH_2-CH_3)$.$3$. Reaction of $sec-butylmagnesium$ bromide with $butanone$ followed by hydrolysis gives $3,4-dimethylhexan-3-ol$.Thus,$(A)$ is $butan-2-ol$.

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