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  4. Which of the following amines gives the characteristic offensive smell of isocyanide when heated with CHCl3 KOH ?

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Q. Which of the following amines gives the characteristic offensive smell of isocyanide when heated with $CHCl_3$ & $KOH$ ?

Amines

Solution:

Chloroform on warming with an alcoholic solution of primary amines and KOH gives carbylamine having offensive smell.
$ CHCl_3 + RNH_2 + 3KOH \xrightarrow{\text{warm}} \underset{\text{ isocyanide}}{RN \equiv C } C + 3KCl + 3H_2O $