AMU Medical AMU Solved Paper-1997

  • question_answer
    For the preparation of t-butyl methyl ether which one of the following methods should be recommended?

    A)  \[C{{H}_{3}}Br+\overset{+}{\mathop{Na}}\,\overline{O}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\]

    B)  \[C{{H}_{3}}\overline{O}\overset{+}{\mathop{Na}}\,+C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-Br\]

    C)  \[C{{H}_{3}}OH+HO-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\xrightarrow[{}]{conc/{{H}_{2}}S{{O}_{4}}}\]

    D)  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-Br+C{{H}_{3}}OH\xrightarrow[{}]{\overset{-}{\mathop{HO}}\,\overset{+}{\mathop{Na}}\,}\]

    Correct Answer: A

    Solution :

    : \[C{{H}_{3}}Br+NaO-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\xrightarrow[{}]{{}}\] \[\underset{tert-butylmethylether}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}}}\,+NaBr\]


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