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Which of the following aldehydes can produce 1o alcohols when treated with Grignard reagent?

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in Chemistry – Class 12 by (188k points)
Which of the following aldehydes can produce 1o alcohols when treated with Grignard reagent?

(a) Methanal

(b) Ethanal

(c) Propanal

(d) Butanal

I had been asked this question by my school principal while I was bunking the class.

This is a very interesting question from Alcohols and Phenols topic in division Alcohols, Phenols and Ethers of Chemistry – Class 12

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Right choice is (a) Methanal

The best I can explain: Methanal on treatment with Grignard reagent forms an adduct which has only one alkyl group attached to the C atom along with two hydrogens and one O-Mg-X (X=halogen) group. This on hydrolysis will form a primary alcohol where the OH group will replace the O-Mg-X group.

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