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Which of the following carbonyl compounds can be prepared from Rosenmund reaction?

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in Chemistry – Class 12 by (188k points)
Which of the following carbonyl compounds can be prepared from Rosenmund reaction?

(a) Methanal

(b) Acetone

(c) Butanone

(d) Benzaldehyde

I had been asked this question in semester exam.

My question comes from Preparation of Aldehydes and Ketones topic in portion Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

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Correct choice is (d) Benzaldehyde

The best I can explain: Rosenmund reaction is exclusively used for the preparation of aldehydes by the substitution of chloride by hydrogen. Given this, methanal cannot be formed from this reaction because its corresponding acyl chloride, i.e., formyl chloride, is unstable at room temperature. Benzaldehyde is formed from benzoyl chloride.

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