Which of the following compound would undergo Aldol condensation?
- \(Methanal\)
- \(Benzaldehyde\)
- \(2,2-Dimethylbutanal\)
- \(Phenylacetaldehyde\)
The Correct Option is B
Solution and Explanation
The compound that would undergo Aldol condensation is Benzaldehyde.
Aldol condensation is a reaction between an aldehyde or ketone with an enolate ion formed from the same or a different molecule. Benzaldehyde has an aldehyde functional group and can readily undergo Aldol condensation. In this reaction, the alpha carbon of the aldehyde is deprotonated by a base to form an enolate ion, which then reacts with another molecule of the aldehyde to form a beta-hydroxy aldehyde (aldol).
The aldol product can undergo subsequent dehydration to form an α,β-unsaturated aldehyde.
Therefore, the correct option is (B): among the given compounds, Benzaldehyde is the one that would undergo Aldol condensation.
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Concepts Used:
Aldehydes, Ketones, and Carboxylic Acids
Aldehydes, Ketones, and Carboxylic Acids are carbonyl compounds that contain a carbon-oxygen double bond. These organic compounds are very important in the field of organic chemistry and also have many industrial applications.
Aldehydes:
Aldehydes are organic compounds that have the functional group -CHO.
Preparation of Aldehydes
Acid chlorides are reduced to aldehydes with hydrogen in the presence of palladium catalyst spread on barium sulfate.
Ketones:
Ketones are organic compounds that have the functional group C=O and the structure R-(C=O)-R’.
Preparation of Ketones
Acid chlorides on reaction with dialkyl cadmium produce ketones. Dialkyl cadmium themselves are prepared from Grignard reagents.
Carboxylic Acid:
Carboxylic acids are organic compounds that contain a (C=O)OH group attached to an R group (where R refers to the remaining part of the molecule).
Preparation of Carboxylic Acids
Primary alcohols are readily oxidized to carboxylic acids with common oxidizing agents such as potassium permanganate in neutral acidic or alkaline media or by potassium dichromate and chromium trioxide in acidic media.