Formaldehyde reacts with which one of the following to give primary alcohols?

Explanation

Formaldehyde (HCHO) can react with Grignard reagents (RMgX, where R is an alkyl or aryl group and X is a halogen) to form primary alcohols through a nucleophilic addition reaction. Here's the general reaction scheme: Formation of Grignard Reagent: RMgX + Mg → R-Mg-X Nucleophilic Addition of Grignard Reagent to Formaldehyde: R-Mg-X + HCHO → R-CH(OH)-R The Grignard reagent acts as a nucleophile, attacking the electrophilic carbon of formaldehyde, which is the carbonyl group (C=O). The reaction results in the formation of an intermediate alkoxide compound. Subsequently, protonation occurs to give the primary alcohol. C2H5MgBr + HCHO → C2H5-CH(OH)-H In this case, the product is ethyl alcohol (C2H5OH), which is a primary alcohol. The Grignard reagent adds to the carbonyl carbon of formaldehyde, resulting in the formation of the alcohol moiety.