BHU PMT BHU PMT (Screening) Solved Paper-2008

  • question_answer
    Which of the following will not give primary amine?

    A)  \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow[{}]{B{{r}_{2}}/KOH}\]

    B)  \[C{{H}_{3}}CN\xrightarrow[{}]{LiAl{{H}_{4}}}\]

    C)  \[C{{H}_{3}}NC\xrightarrow[{}]{LiAl{{H}_{4}}}\]

    D)  \[C{{H}_{3}}CON{{H}_{2}}\xrightarrow[{}]{LiAl{{H}_{4}}}\]

    Correct Answer: C

    Solution :

                     Isocyanide on reduction with\[LiAl{{H}_{4}}\] is presence of ether give secondary amine. \[C{{H}_{3}}NC+2{{H}_{2}}\xrightarrow[ether]{LiA{{H}_{4}}}\underset{{{2}^{o}}\,a\min e}{\mathop{C{{H}_{3}}-\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{N}}\,-H}}\,\]


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