Question

Q.(a) only primary amine gives carbyl amine reaction. why​

Answer 1

Answer:

only primary amine gives carbylamine reaction

Explanation:

The carbylamine reaction (also known as the Hoffmann isocyanide synthesis) is the synthesis of an isocyanide by the reaction of a primary amine, chloroform, and base. The conversion involves the intermediacy of dichlorocarbene.

Illustrative is the synthesis of tert-butyl isocyanide from tert-butylamine in the presence of catalytic amount of the phase transfer catalyst benzyltriethylammonium chloride.[1]

   Me3CNH2 + CHCl3 + 3 NaOH → Me3CNC + 3 NaCl + 3 H2O

Similar reactions have been reported for aniline. It is used to prepare secondary amines.

Answer 2

Answer :-

In secondary amine and tertiary amine, nitrogen does not hold more hydrogen atoms, and also, a sterically highly unstable product will be formed if the secondary amines and tertiary amines would be reacted. And notably, alkyl isocyanides are the compounds that exhibit unpleasant smelling. Hence, we use this test for the detection of only the primary amines.

Refer attachment for reaction.

Remarks :-

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