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  4. Which of the following amines gives carbylamine reaction?

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Q. Which of the following amines gives carbylamine reaction?

Haryana PMTHaryana PMT 2010

Solution:

Aliphatic and aromatic primary amines when warmed with chloroform and an alcoholic solution of $ KOH $ , form isocyanide or carbylamine.
$\underset{\text { ethyl amine }}{ C _{2} H _{5} NH _{2}}+\underset{\text { chloroform }}{ CHCl _{3}}+3 KOH$ (alc.) $\xrightarrow{\text { Warm }} \underset{\text { ethyl isocyanide }}{ C_2 H _{5} NC }+3 KCl +3 H _{2} O$
Carbylamine reaction is a characteristic reaction of primary amines and can be used to distinguish primary amines from secondary and tertiary amines.