BCECE Engineering BCECE Engineering Solved Paper-2010

  • question_answer On reduction secondary amine is given by

    A)  nitroethane     

    B)  methylcyanide

    C)         methylisocyanide

    D)        nitrobenzene

    Correct Answer: C

    Solution :

    Reduction    of   nitroethane    \[({{C}_{2}}{{H}_{5}}N{{O}_{2}}),\] methylcyanide \[(C{{H}_{3}}CN)\] and nitrobenzene \[({{C}_{6}}{{H}_{5}}N{{O}_{2}})\] gives\[{{\text{1}}^{\text{o}}}\] amine, while reduction of isocyanide gives \[{{2}^{\text{o}}}\] amine. \[C{{H}_{3}}N\underset{\to }{\mathop{=}}\,C\xrightarrow{LiAl{{H}_{4}}}\underset{{{\text{2}}^{\text{o}}}\text{amine}}{\mathop{C{{H}_{3}}NHC{{H}_{3}}}}\,\]

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