Haryana PMT Haryana PMT Solved Paper-2011

  • question_answer
    The reagent used for the preparation of higher ethers from halogenated ethers is

    A)  cone. \[{{H}_{2}}S{{O}_{4}}\]

    B)  sodium alkoxide

    C)  dry silver oxide  

    D)  Grignard reagent

    Correct Answer: D

    Solution :

    \[\underset{lower\,ether}{\mathop{C{{H}_{3}}OC{{H}_{3}}}}\,\xrightarrow{C{{l}_{2}}/hv}\underset{\begin{smallmatrix}  \text{ }\!\!\alpha\!\!\text{ -chlorodimethyl}\,\text{ether} \\  \text{(lower}\,\text{halogenated}\,\text{ether)} \end{smallmatrix}}{\mathop{C{{H}_{3}}OC{{H}_{2}}Cl}}\,\] \[C{{H}_{3}}OC{{H}_{2}}Cl+\underset{\begin{smallmatrix}  Grignard \\  reagent \end{smallmatrix}}{\mathop{C{{H}_{3}}MgBr}}\,\xrightarrow[{}]{Dry\,etger}\]


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