Question
Preparation of alcohols from alkenes involves the electrophilic attack on alkene carbon atom. Explain its mechanism.
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Answer
The mechanism of acid catalysed addition of water (hydration) to alkenes involves the following three steps:
Step 1: Electrophilic attack by hydronium ion $(H_3O^+)$ on alkene gives an intermediate, carbocation.
Step 2: Nucleophilic attack by water on carbocation to yield protonated alcohol.
Step 3: Deprotonatio (loss of proton) to from an alcohol.
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