1.

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

Answer»

Solution :Aromatic primary amines react with `HNO_(2)` at `273-278K` to form aromatic diazonium salts.
Aliphatic primary amines also react with `HNO_(2)` at 273-278K to form aliphatic diazonium salts. But these are unstable EVEN at low temperature and thus decomposes readily to form a mixture of compounds consisting of alkyl chlorides, alkenes adn alcholos, out of which alcohols generally predominantes.
`underset("Ethylamine")(CH_(3)CH_(2)NH_(2))+HNO_(2)+HCL underset((-2H_(2)O))overset(273-278K)(to) underset(("unstable"))underset("Ethanediazonium CHLORIDE")([CH_(3)CH_(2)-N-=N]Cl^(-))overset(H_(2)O)(to) underset("Ethanol")(CH_(3)CH_(2)OH)+N_(2)+HCl`


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