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प्रश्न
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
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उत्तर
Aniline is acetylated, before the nitration reaction in order to avoid the formation of tarry oxidation products and protect the amino group, so that p-nitro derivative can be obtained as major product.
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संबंधित प्रश्न
Give reasons for the following:
Aniline does not undergo Friedel- Crafts reaction.
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Write the structures of main products when aniline reacts with the following reagents :
(CH3CO)2O/pyridine
Write the chemical equations involved when aniline is treated with the following reagents:
Br2 water
Account for the following:
Although the amino group is o, p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
What is the action of acetic anhydride on diethylamine?
Illustrate the following reactions giving suitable example in each case
Acetylation of amines
Assertion: N, N-Diethylbenzene sulphonamide is insoluble in alkali.
Reason: Sulphonyl group attached to nitrogen atom is strong electron-withdrawing group.
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
Aniline does not give Friedel-Crafts reaction. Give a reason.
