Question

The most likely acid–catalysed aldol condensation products of each of the two aldehydes I and II will respectively be: 

• A. option (a) shown
• B. option (b) shown
• C. option (c) shown
• D. option (d) shown

Hint:

Acid–catalysed aldol reactions favour the more substituted, conjugated alkene.

Answer 1

The Correct Option is D

Step 1: In acid–catalysed aldol condensation, enol formation occurs followed by C–C bond formation.
Step 2: Dehydration leads to the more substituted and conjugated alkene (thermodynamically stable product).
Step 3: Option (d) represents the most substituted α,β-unsaturated aldehydes for both I and II.