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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
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?
What is the action of the following reagents on aniline?
Acetic anhydride
What is the action of the following reagents on aniline?
Hot and conc. sulphuric acid
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.
