Which major product forms if the aldol condensation does not undergo a dehydration reaction?

• A. Enal
• B. Aldol
• C. Carboxylic Acid
• D. Ketone

Answer: (B)

In an aldol condensation reaction, two carbonyl compounds (typically aldehydes or ketones) undergo a nucleophilic addition to form a β-hydroxy carbonyl compound, known as an aldol. If the reaction proceeds but does not undergo the dehydration step, the major product will be this aldol, which contains both a hydroxyl (–OH) group and a carbonyl (C=O) group at different positions in the molecule.

The aldol product is characterized by its ability to further dehydrate to form an enal or α,β-unsaturated carbonyl compound if dehydration is allowed. However, since the question specifies that dehydration does not occur, the direct outcome of the reaction is simply the aldol itself. Therefore, identifying the reaction condition that retains the hydroxyl and carbonyl functionalities confirms the aldol as the major product.

The other options refer to products that would arise from further reactions or different reaction conditions: an enal would form if dehydration occurred, a carboxylic acid could be derived from further oxidation of an aldol or where the condensation leads to overreaction, and a ketone may arise from using a ketone as a reactant or as an independent reaction. Nonetheless, under the