Question:
The condensation reaction between one equivalent of acetone and two equivalents of benzaldehyde in presence of dilute alkali leads to the formation of
The condensation reaction between one equivalent of acetone and two equivalents of benzaldehyde in presence of dilute alkali leads to the formation of
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Aldol with aldehyde (no $\alpha$-H):
→ multiple condensation possible
→ forms conjugated product
Updated On: May 1, 2026
- benzalacetophenone
- benzylideneacetone
- dibenzylideneacetone
- benzoic acid and acetic acid
- only benzoic acid
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The Correct Option is C
Solution and Explanation
Concept: Aldol Condensation
• Acetone has $\alpha$-hydrogen → forms enolate
• Benzaldehyde has no $\alpha$-H → acts only as electrophile Reaction mechanism:
•
Step 1: Acetone forms enolate
•
Step 2: Attacks benzaldehyde → forms $\beta$-hydroxy ketone
•
Step 3: Dehydration → $\alpha,\beta$-unsaturated ketone
•
Step 4: Second condensation with another benzaldehyde Final product: \[ \text{Dibenzylideneacetone} \]
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