NCERT Class XII Chemistry
Chapter - Alcohols, Phenols and Ethers
Questions with Solutions
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Question : 11
Total: 45
Write the mechanism of hydration of ethene to yield ethanol.
Solution:
The acid catalysed hydration of ethene may be represented as :
Step 1 : Generation of carbocation : Protonation of ethene yields a carbocation as
The mechanism followed by the above reaction may be depicted as
Step 1 : Generation of carbocation : Protonation of ethene yields a carbocation as
Step 2 : Nucleophilic attack of water on carbocation : The carbocation polarizes the lone pair electrons of O of water and hydration takes place.
Step 3 : Formation of product, Regeneration of the proton :
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