question_answer

Primary amine reacts with carbon disulphide and \[HgC{{l}_{2}}\] to produce alkyl isothiocyanate. This reaction is:

A)  Carbylamine reaction

B)  Hofmann bromide reaction

C)  Perkin reaction

D)  Hofmann mustard oil reaction

Correct Answer: D

Solution :

Primary amines react, with \[C{{S}_{2}}\] and \[HgC{{l}_{2}}\] to form alkyl isothiocyanate and the reaction is called Hofmanns-mustard oil reaction. Carbylamine reaction: The reaction is used to test p-amines. \[\underset{p-a\min e}{\mathop{R-N{{H}_{2}}}}\,+\underset{chorofrom}{\mathop{CHC{{l}_{3}}}}\,+3KOH\to \underset{\begin{smallmatrix}  alkyl\,iscoyanide \\  (foul\,smelling) \end{smallmatrix}}{\mathop{RN\overset{\to }{\mathop{=}}\,C}}\,\]                                                 \[+3KCl+3{{H}_{2}}O\] Perkin reaction: