What is meant by aldol condensation reaction?
What is meant by aldol condensation reaction?
An aldol condensation is a condensation reaction in organic chemistry in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or β-hydroxyketone (an aldol reaction), followed by dehydration to give a conjugated enone.
What is the product of the aldol condensation?
The product formed in aldol condensation is beta hydroxy aldehyde or beta hydroxy ketone.
How does aldol condensation reaction work?
In aldol condensation, an enolate ion reacts with another carbonyl compound to form a conjugated enone. The process occurs in two parts: an aldol reaction, which forms an aldol product, and a dehydration reaction, which removes water to form the final product. Created by Jay.
What is aldol condensation used for?
The reaction is commonly used to produce solvents such as alcohol isophorone and diacetone. It works as an intermediate for perfume production. It is also used in pharmaceutical manufacturing, unsaturated ketones and chalcones known as aromatic ketones. Usually, it is used to create plasticizers as well.
Why aldol condensation is reversible?
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.
What is aldol condensation Class 12?
This reaction’s name has been derived from the functional groups, namely aldehyde and alcohol present in the reaction products. Hence, the Aldol condensation reaction is an organic reaction in which a carbonyl compound reacts with enolate ion and leads to the formation of the β-hydroxy aldehyde or β-hydroxy ketone.
Is an aldol condensation reversible?
In the presence of acid or base catalysts the aldol reaction is reversible, and the beta-hydroxy carbonyl products may revert to the initial aldehyde or ketone reactants. In the absence of such catalysts these aldol products are perfectly stable and isolable compounds.
What is unique about a cross Claisen condensation?
A Claisen condensation between two different esters is called a crossed Claisen condensation. Therefore, just like the aldol reactions, efficient crossed Claisen condensation is possible in two scenarios: One of the esters does not have α (alpha) hydrogens and therefore, it cannot form an enolate.
