Answer: Nucleophile.
- A Nucleophile
- B Electrophile
- C Free radical
- D Lewis acid
Correct answer: A. Nucleophile
Explanation: The enolate formed at the alpha carbon is nucleophilic and attacks the carbonyl carbon of another molecule.
Curved arrows show the nucleophile attacking the carbonyl carbon while the C=O pi electrons move onto oxygen, giving a tetrahedral alkoxide intermediate.
Concept context
Aldehydes, ketones, carboxylic acids, and their derivatives (esters, amides, acid chlorides). Key reactions include nucleophilic addition, Aldol condensation, Cannizzaro, and Claisen. Very heavily tested in JEE and NEET.
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