1.

(a) Write the mechanism of the following reaction : 2CH_(3)CH_(2)OH (H^(+))/(413K)CH_(3)CH_(2)OCH_(2)CH_(3)+H_(2)O (b) Write the preparation of phenol from cumene.

Answer»

SOLUTION :(a) Step 1. Protonation of alcohol
`CH_(3)-CH_(2)-overset(* *)underset(* *)O-H+H^(+)toCH_(3)-CH_(2)overset(" "+)_overset(H)overset(* *)underset(* *)O-H`
Step 2. Addition of second alcohol molecule to the protonated alcohol

Step 3. Removal of proton

(b) Cumene is oxidised in the presence of air to give cumene hydroperoxide. It is converted to PHENOL and acetone by treating it with dilute acid.


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