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(C) Isopropyl alcohol $(CH_3CH(OH)CH_3)$ is a secondary alcohol. It can be prepared by the reaction of a Grignard reagent with an aldehyde other than

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$CH_3MgI$ and $CH_3CHO$

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(C) Isopropyl alcohol $(CH_3CH(OH)CH_3)$ is a secondary alcohol. It can be prepared by the reaction of a Grignard reagent with an aldehyde other than formaldehyde. Specifically,the reaction of $CH_3MgI$ with acetaldehyde $(CH_3CHO)$ yields isopropyl alcohol after hydrolysis: $CH_3CHO + CH_3MgI \rightarrow CH_3CH(OMgI)CH_3$ $CH_3CH(OMgI)CH_3 + H_2O/H^+ \rightarrow CH_3CH(OH)CH_3 + Mg(OH)I$ Therefore,the correct combination is $CH_3MgI$ and $CH_3CHO$.

Which of the following combinations can be used for the synthesis of isopropyl alcohol?

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