BCECE Medical BCECE Medical Solved Papers-2012

  • question_answer
    Predict the product C obtained in the following reaction of butyne -1. \[C{{H}_{3}}C{{H}_{2}}-C\equiv CH+HCl\xrightarrow{{}}B\xrightarrow{HI}C\]

    A)  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}-C{{H}_{2}}I\]

    B)  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-\overset{\begin{smallmatrix}  I \\  | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,}}\,-H\]

    C)  \[C{{H}_{3}}C{{H}_{2}}CH-\overset{\begin{smallmatrix}  I \\  | \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}Cl\]

    D)  \[C{{H}_{3}}C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix}  I \\  | \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}\] 

    Correct Answer: D

    Solution :

    \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH+HCl\xrightarrow{{}}\]                 \[C{{H}_{3}}C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,=C{{H}_{2}}\xrightarrow{HI}\]                 \[C{{H}_{3}}-C{{H}_{2}}-\overset{\begin{smallmatrix}  I \\  | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}\] 2-chloro- 2- iodobutane


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