AMU Medical AMU Solved Paper-1999

  • question_answer
    Which of the following can exhibit keto-enol tautomerism?

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

    B)  \[CC{{l}_{3}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]

    C)  \[H-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]

    D)  \[{{(C{{H}_{3}})}_{3}}C-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-H\]

    Correct Answer: A

    Solution :

    : \[\underset{keto}{\mathop{H-\underset{\begin{smallmatrix}  | \\  H \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,}}\,\underset{enol}{\mathop{H-\underset{\begin{smallmatrix}  | \\  H \end{smallmatrix}}{\mathop{C}}\,=\underset{\begin{smallmatrix}  | \\  O-H \end{smallmatrix}}{\mathop{C-H}}\,}}\,\]


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