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Write short notes on the following: (iv) Coupling reaction

13.7     Write short notes on the following:

                (iv) Coupling reaction

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M manish

Coupling reaction- 
The reaction of joining of diazonium salt to the aromatic ring (like phenol) through -N=N- bond is known ass coupling reaction. Benzene diazonium chloride reacts with phenol in which the phenol molecule at its para position is coupled with the diazonium salt(C_{6}H_{5}N^{+}_{2}Cl^{-}) to give p-hydroxyazobenzene(orange in colour)

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diazonium salt reacts with aniline to give p-aminoazobenzene (yellow colour)

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