12th Class Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank MCQs - Alcohols, Phenols and Ethers

  • question_answer
    Phenyl methyl ether (anisole) reacts with HI to give phenol and methyl iodide and not iodobenzene and methyl alcohol because

    A) ion prefers to combine with the smaller group in order to minimise steric hindrance

    B) \[{{I}^{-}}\] ion is not reactive towards benzene

    C) phenol is formed as a result of hydrolysis of iodobenzene

    D) methyl alcohol formed during reaction reacts with \[{{I}^{-}}\] to form methyl iodide.

    Correct Answer: A

    Solution :

    In the first step, ether gets protonated to form oxonium ion \[{{C}_{6}}{{H}_{5}}-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{+}{\mathop{O}}}\,-C{{H}_{3}}\]. I- prefers to combine with smaller group in order to reduce steric hindrance.


You need to login to perform this action.
You will be redirected in 3 sec spinner