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(B) The reaction of formaldehyde $(HCHO)$ with a Grignard reagent $(CH_3MgBr)$ in the presence of dry ether proceeds as follows:$1$. Nucleophilic atta

Vedclass · Accepted Answer

Primary alcohol with one carbon atom more than aldehyde.

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(B) The reaction of formaldehyde $(HCHO)$ with a Grignard reagent $(CH_3MgBr)$ in the presence of dry ether proceeds as follows:$1$. Nucleophilic attack of the $CH_3^-$ group from the Grignard reagent on the electrophilic carbonyl carbon of formaldehyde leads to the formation of an addition product: $H_3C-CH_2-OMgBr$.$2$. Subsequent acid hydrolysis $(H^+/H_2O)$ of this intermediate yields ethanol $(CH_3CH_2OH)$,which is a primary $(1^\circ)$ alcohol.$3$. Formaldehyde contains $1$ carbon atom,and the resulting ethanol contains $2$ carbon atoms.$4$. Therefore,the product is a primary alcohol with one carbon atom more than the starting aldehyde.

What type of product is obtained when formaldehyde reacts with $CH_3MgBr$ in dry ether?

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