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प्रश्न
Why is the α-hydrogens of aldehydes and ketones are acidic in nature?
Account for the following:
The alpha (α)-hydrogens of aldehydes and ketones are acidic in nature.
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उत्तर
Because of the strong electron-withdrawing nature of the carbonyl groups and the resonance stabilisation of the conjugate base, aldehydes and ketones are acidic in nature.
| \[\begin{array}{cc} \ce{R}\phantom{..........}\\ \backslash\phantom{........}\\ \ce{C = O}\\ /\phantom{........}\\ \ce{H}\phantom{..........}\\ \end{array}\] |
\[\begin{array}{cc} \ce{R}\phantom{..........}\\ \backslash\phantom{........}\\ \ce{C = O}\\ /\phantom{........}\\ \ce{R}\phantom{..........}\\ \end{array}\] |
| Aldehyde | Ketone |
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संबंधित प्रश्न
Write the products formed when CH3CHO reacts with the following reagents: CH3CHO in the presence of dilute NaOH
What is meant by the following term? Give an example of the reaction in the following case.
Aldol
Write structural formulas and names of four possible aldol condensation products from propanal and butanal. In each case, indicate which aldehyde acts as nucleophile and which as electrophile.
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Why is alpha (α) hydrogen of carbonyl compounds acidic in nature?
Write a chemical equation for the following reaction:
Propanone is treated with dilute Ba( OH)2.
What is substituted imine called?
Give reasons to support the answer:
Presence of Alpha hydrogen in aldehydes and ketones is essential for aldol condensation.
Assertion (A): The final product in Aldol condensation is always α, β-unsaturated carbonyl compound.
Reason (R): α, β-unsaturated carbonyl compounds are stabilised due to conjugation.
Which one of the following undergoes reaction with 50% sodiumhydroxide solution to give the corresponding alcohol and acid:
