MCQ
Foul smelling compound formed, during carbyl amine reaction is :
  • A
    Alcohol
  • B
    Aldehyde
  • Alkyl isocyanide
  • D
    Carboxylic acid

Answer

Correct option: C.
Alkyl isocyanide
c
(c) On heating $CHC{l_3}$ with ethanolic $KOH$ and primary amine, isocyanide is formed and is readily detected by its offensive odour. This is called as carbyl amine test.

$\underset{Chloroform}{\mathop{CHC{{l}_{3}}}}\,+\underset{\begin{matrix}
   Potassium  \\
   hydrogen  \\
\end{matrix}}{\mathop{3KOH}}\,+\underset{\begin{smallmatrix} 
 primary \\ 
 a\min e 
\end{smallmatrix}}{\mathop{RN{{H}_{2}}}}\,$ $\xrightarrow{\Delta }\,\underset{\begin{smallmatrix} 
 Alkyl \\ 
 Isocyanide 
 \\ 
 (Foul\,\,smell) 
\end{smallmatrix}}{\mathop{RNC}}\,\,+\,\,\underset{\begin{smallmatrix} 
 Potassium \\ 
 chloride 
\end{smallmatrix}}{\mathop{3KCl}}\,\,+\,\,\underset{Water}{\mathop{{{H}_{2}}{{O}_{2}}}}\,$

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