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Amines

Question
CBSEENCH12009092

Write the reactions of (i) aromatic, (ii) aliphatic primary amines with nitrous acid.

Solution
(i) Primary aromatic amines such as aniline react with nitrous acid under ice cold conditions (273-278 K) to form benzene diazonium salt. The reaction is known as diazotization reaction.

(ii) Primary aliphatic amines react with nitrous acid at low temperature to form primary alcohol and nitrogen gas accompanied by risk effervescence. For example