Aldol Condensation || with Mechanism || Aldehyde Chemical Rxn| ALDOL Reaction with Easy Mechanism

Aldol Condensation reaction in Aldehydes
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1. Aldol Condensation Reaction (Aldehyde) It is a organic reaction between same type of carbonyl compounds(Ketone /Aldehyde) in the presence of strong base to form β- hydroxy ketone or β- hydroxy aldehyde product. We can easily remember this reaction Aldol= Ald + ol Aldehyde into oL (Alcohol) Why Carbonyl compounds undergo aldol condensation reaction Due to presence of α -hydrogen. The acidic property of α-hydrogen in aldehydes and ketones is because of the high electron-withdrawing capacity of the carbonyl group and resonance stabilization of the conjugate base.

2. Example of Aldol Reaction in Aldehydes

3. Reaction Mechanism Step 1: Removal of α-hydrogen from the base Carbanion

4. Step 2: The first step results in the formation of carbanion which undergoes a nucleophilic addition reaction with the carbonyl group present in the second molecule of the aldehyde (in this case ethanal). The second step results in the formation of the condensation product.

5. Step 3: Protonation of alkoxide ion will occur due to reaction with water.

6. Step 4: Heating of the aldol compound in the basic solution will help in dehydrating the product to form α β‐unsaturated aldehyde compound.

7. Upcoming Topics Aldol Condensation in Ketonic Compounds Cross Aldol Condensation Reaction Cannizzaro Reaction Wurth Reaction Friedel-Crafts Reaction