Manipal Medical Manipal Medical Solved Paper-2008

  • question_answer
    Ethyl acetate is obtained when methyl magnesium bromide reacts with

    A)  ethyl formate   

    B)  ethyl chlorofbrmate

    C)  acetyl chloride  

    D)  carbon dioxide

    Correct Answer: B

    Solution :

    Ethyl acetate is obtained when methyl magnesium bromide reacts with ethyl chloroformate. \[C{{H}_{3}}MgBr+Cl-\overset{\begin{smallmatrix}  O \\  |\,| \end{smallmatrix}}{\mathop{C}}\,-O-{{C}_{2}}{{H}_{5}}\] \[\xrightarrow[{}]{{}}\left[ Cl-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  OMgBr \\  | \end{smallmatrix}}{\mathop{C}}}\,-O-{{C}_{2}}{{H}_{5}} \right]\]            \[\downarrow \]       \[\underset{Ethyl\text{ }acetate}{\mathop{C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-O-{{C}_{2}}{{H}_{5}}}}\,+MgBrCl\]


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