Why do 2^ and 3^ amines fail to undergo the carbylamine test? [Guj CET 2010]

JEE Main Chemistry question

Why do and amines fail to undergo the carbylamine test? [Guj CET 2010]

(A)They combine with chloroform to give a stable compound
(B)They react with alcoholic KOH
(C)Their nitrogen atom does not have the required number of hydrogen atomsCorrect
(D)All the given reasons are correct

Answer: (C)

Solution

The carbylamine (isocyanide) reaction converts a primary amine's group, via reaction with the carbene (generated from chloroform and a strong base) and loss of two molecules of HCl, into the isocyanide . This mechanism specifically requires two hydrogen atoms on the amine nitrogen. A

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Question ID VK-150283