12th Class Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर

  • question_answer 31)
    Write the mechanism of acid catalysed dehydration ofethanol to yield ethene. Step involved in acid catalysed dehydration are (i) Protonation of alcohol, (ii) Formation of carbocation. (iii) Elimination of a proton.  

    Answer:

    Solution. Mechanism of acid catalysed dehydration of ethanol Step I: Protonation of ethanol   Step II: Formation, of carbocation   Step III: Elimination of a proton.   Note The acid used in Step J is released in Step III. To drive theequilibrium to the right, ethene is removed as it is formed.  


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