Describe the following:
(i) Acetylation
(ii) Cannizzaro reaction
(iii) Cross aldol condensation
(iv) Decarboxylation

Explanation

Acetylation : When benzene or substituted benzene is treated with acetyl chloride in the presence of anhydrous aluminium chloride, the corresponding ketone is obtained . This is called acetylation reaction . Substitution of hydrogen atom by acetyl group `(CH_(3) CO-) ` is acetylation

Phenols, primary and secondary amines also undergo acetylation with acetyl chloride or acetic anhydride