Complete the following reactions: C 6 H 5 N 2 Cl ⊝ ⊕ + C 2 H 5 OH →

When benzene diazonium chloride reacts with ethanol it forms benzene and acetaldehyde along with the removal of nitrogen gas and hydrogen chloride. It is a single step nucleophilic substitution reaction. C 6 H 5 N 2 Cl ⊝ ⊕ + C 2 H 5 OH → C 6 H 6 + N 2 + HCl + CH 3 CHO

Write short notes on Coupling reaction.

The azo products obtained have an extended conjugate system having both the aromatic rings joined through the – N = N – bond. These compounds are often coloured and are used as dyes. Benzene diazonium chloride reacts with phenol in which the phenol molecule at its para position is coupled with the diazonium salt to form p - hydroxyazobenzene. This type of reaction is known as coupling reaction.