Chemistry - Carbonyl compounds Question with Solution | TestHub

Question Explanation:

The question asks to identify the reaction in which an aldehyde is not formed.

Concept:

This question is based on reactions that typically yield aldehydes, such as the Rosenmund reduction, Stephen reaction, DIBAL-H reduction, and the reaction of Grignard reagents with benzonitrile (Ph-C≡N).

Solution:

(1) Rosenmund reduction :

(2) Stephen reduction :

(3) Nucleophilic addition of Grignard reagent:

(4) Reduction of ester using DIBAL – H

Product of reaction (3) is ketone

Final Answer: Option (3)