What is aldol condensation Class 12?
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.
Which of the following will undergo aldol condensation 1 point?
Reason (R) : Aldehydes and ketones having α-hydrogen undergo aldol condensation.
What is alpha hydrogen Class 11?
Answer. 110.7k+ views. Hint: In an organic molecule, the carbon atom that is directly bonded to the functional group such as a carbonyl or hydroxyl group is known as the alpha carbon. The hydrogen atom attached to the alpha carbon atom is known as alpha hydrogen.
What is aldol condensation with example?
undergo aldol reactions (also called aldol condensation) by the use of certain techniques. The reaction is often used to close rings, in which case one carbon provides the carbonyl group and another provides the carbon with an α-hydrogen. An example is the synthesis of 2-cyclohexenone.
Which of the following will undergo aldol condensation 1 point a ch2 Chcho B Ch Ccho C c6h5cho D ch3ch2cho?
Since CH3CH2CHO has α-hydrogen atom, therefore it will undergo aldol condensation in the presence of cold dilute alkali.
Which one reacts with aldehyde and ketone?
Formation of Imines and Related Compounds. The reaction of aldehydes and ketones with ammonia or 1º-amines forms imine derivatives, also known as Schiff bases, (compounds having a C=N function).
What are alpha and beta hydrogens?
The nomenclature can also be applied to the hydrogen atoms attached to the carbon atoms. A hydrogen atom attached to an alpha carbon atom is called an alpha-en atom, a hydrogen atom on the beta-carbon atom is a beta hydrogen atom, and so on.
What is a gamma hydrogen?
According to these definitions, gamma hydrogen atoms are those bond with penultimate carbon as well as those belong to the CH3 at the end of chain. Accordingly, the gamma carbon is not the third carbon next to aromatic ring, but the penultimate one.
What is aromatic ketone?
Solution. The compounds in which a group is attached to either two aryl groups or one aryl and one alkyl group are called aromatic ketones.
Which of the following carbonyl compounds undergo aldol condensation?
All carbonyl compounds containing α−H or α−D undergo aldol condensation. In given example, benzaldehyde does not contain α−H to -CHO, hence does not undergo aldol condensation.
Can CH2 Chcho undergo aldol condensation?
A typical compound undergoes Cannizzaro’s reaction as well as aldol condensation. The possible comp… The compound which does not give aldol condensation is .. [ DEC 2005] a) CH3CHO b) (CH3)3C – C…
What is the mechanism of an aldol addition?
The E1CB Mechanism in Aldol Condensation Let’s sum this one more time – the aldol addition reaction is the reaction between the enolate and the carbonyl producing an β-hydroxy carbonyl compound . This compound is then converted into an ɑ, β-unsaturated carbonyl compound via an elimination reaction.
What is an example of condensation reaction?
Condensation reactions occur mainly in organic chemistry. An example is the reaction between a ketone and hydroxylamine to produce an oxime and water. A similar process involving monomers (polymer building blocks) can be used to produce a polymer in a type of reaction called condensation polymerization.
What is the by product of condensation reaction?
When we talk about condensation polymerization, it is a form of a step-growth polymerization where smaller molecules or monomers react with each other to form larger structural units (usually polymers) while releasing by products such as water or methanol molecule . The by products are normally referred to as condensate .
What does aldol mean?
• ALDOL (noun) The noun ALDOL has 1 sense: 1. an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde ; contains an alcohol group (-OH) and an aldehyde group (-CHO) Familiarity information: ALDOL used as a noun is very rare. Dictionary entry details.