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sangeeta roy Grade: 12

What is aldol condensation and canizzaro reaction ?

What is their reaction mechanism ?

7 years ago

Answers : (1)

879 Points

Dear student,

Aldol Reaction:

Reactions in which a larger molecule is formed from smaller components with the elimination of a very small by-product such as water are termed Condensations. Hence the following examples are properly referred to as aldol condensations. The dehydration step of an aldol condensation is also reversible in the presence of acid and base catalysts. Consequently, on heating with aqueous solutions of strong acids or bases, many α, β-unsaturated carbonyl compounds fragment into smaller aldehyde or ketones, a process known as the retro-aldol reaction.


Cannizzaro Reaction

This redox disproportionation of non-enolizable aldehydes to carboxylic acids and alcohols is conducted in concentrated base.

α-Keto aldehydes give the product of an intramolecular disproportionation in excellent yields.


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Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

7 years ago
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