Chlorobenzene can be obtained from benzene diazonium chloride by

Options

A. Gattermann's reaction
B. Friedel Crafts reaction
C. Wurtz reaction
D. Fittig reaction. Amers

Explanation

To obtain chlorobenzene from benzene diazonium chloride, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Benzene Diazonium Chloride**:
- Benzene diazonium chloride is represented as C6H5N2Cl. It contains a diazonium group (N2+) attached to a benzene ring.

2. **Reaction Setup**:
- To convert benzene diazonium chloride to chlorobenzene (C6H5Cl), we will use hydrochloric acid (HCl) and copper powder (Cu) as reagents.

3. **Mechanism of the Reaction**:
- When benzene diazonium chloride is treated with HCl in the presence of copper powder, the nitrogen group (N2) is eliminated.
- The reaction proceeds as follows:
- The diazonium group (N2+) is unstable and will lose nitrogen gas (N2) when it reacts.
- The chloride ion (Cl-) from HCl will then attack the positively charged carbon in the benzene ring.

4. **Formation of Chlorobenzene**:
- As a result of the attack by the chloride ion, chlorobenzene is formed:
- The structure changes from C6H5N2Cl to C6H5Cl (chlorobenzene) and nitrogen gas (N2) is released.

5. **Byproducts**:
- The byproduct of this reaction is nitrogen gas (N2) and hydrochloric acid (HCl).

6. **Conclusion**:
- The overall reaction can be summarized as:
\[ C6H5N2Cl + HCl \xrightarrow{Cu} C6H5Cl + N2 + HCl \]
- Thus, chlorobenzene is obtained from benzene diazonium chloride through this reaction.