Coupling Reaction of Phenol

When an ice cold solution of phenol is treated with an ice cold solution of benzene diazonium chloride in mildly alkaline medium p_hydroxy azo benzene (Azo dye) is formed. This reaction is called coupling reaction.

For more reaction of phenol visit
Kolbe's Reaction of Phenol
Fries rearrangement: Reaction of phenol
Reimer-Tiemann reaction of phenol

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