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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsMedium

Question

The reaction between benzaldehyde and acetophenone in the presence of dilute NaOH is known as:

A

Cannizzaro's reaction

B

Cross Cannizzaro's reaction

C

Cross aldol condensation

D

Aldol condensation

Step-by-Step Solution

The reaction involves two different carbonyl compounds: Benzaldehyde (C6H5CHOC_6H_5CHO) and Acetophenone (C6H5COCH3C_6H_5COCH_3).

  1. Benzaldehyde lacks α\alpha-hydrogens and cannot undergo self-aldol condensation (it would undergo Cannizzaro in concentrated base, but dilute base is specified).
  2. Acetophenone possesses α\alpha-hydrogens and can form an enolate ion in the presence of dilute NaOH.
  3. When these two react, the enolate generated from acetophenone attacks the electrophilic carbonyl carbon of benzaldehyde.
  4. Since the condensation occurs between two different carbonyl compounds (one aldehyde and one ketone), it is termed a Cross Aldol Condensation (specifically, a Claisen-Schmidt condensation).

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidsreactionbetweenbenzaldehydeacetophenonepresence

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