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Discuss aldol condensation....

Discuss aldol condensation.

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Aldos condensation : Aldehydes and ketones having at least one a-hydrogen undergo a reaction in the presence of, dilute alkali as catalyst to form B-hydroxy aldehydes (aldol) `beta`- hydroxy-ketones.(ketols).
This is known as Aldol reaction.
.The name aldol is derived from the names of the two seva functiớnal groups, aldehiyde and alcohol.
`2CH_(3)CHO overset("dilute NaOH")hArr underset(("Aldol")) underset("3-Hydroxybutanal") underset(OH) underset(|)(CH_(3)-CH-CH_(2))-CHO overset(Delta) underset(-H_(2)O)to underset("But-2-enal")(CH_(3)-CH=CH-CHO)`
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Explain with one example for crossed aldol condensation.

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Explain crossed aldol condensation with suitable examples

(A) : Propionaldehyde undergoes aldol condensation . (R) : Propionaldehyde contains five alpha hydrogen atoms

Which of the following compounds can be synthesized by intermolecular aldol condensation in very good yield ?

Describe the following: (i) Acetylation (ii) Cannizzaro reaction (iii) Cross aldol condensation (iv) Decarboxylation

Among the following compounds, some undergo aldol condensation , some undergo Cannizzaro reaction and the remaining undergo neither aldol condensation nor Cannizzaro reaction . Differentiate them and write the structures of the products of aldol condensation and Cannizzaro reaction. i) Benzaldehyde ii) Cyclohexanone iii) Methanal iv) Benzophenone v) 2- Methylpentanal vi) Butan - 1- ol vii) 2,2 - Dimethylbutanal viii) Phenyl acetaldehyde iv) 1 - Phenylpropanone

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.

Which of the following compounds would undergo aldol condensation, which the Cannizzaro reaction and which neither? Write the structures of the expected products of aldol condensation and Cannizzaro reaction. {:("(i) Methanal"," (ii) 2-Methylpentanal"," (iii) Benzaldehyde"),("(iv) Benzophenone"," (v) Cyclohexanone"," (vi) 1-Phenylpropanone"),("(vii) Phenylacetaldehyde"," (viii) Butan-1-ol"," (ix) 2,2-Dimethylbutanal"):}