`C_(6) H_(5)N2^+Cl^-overset(Cu_(2)Cl_(2)//HCl)(rarr)` , this reaction is named as

Options

A. Sandmeyer
B. Swarts
C. Wurtz-fitting
D. Finkelstein

Answer

To determine the name of the reaction represented by the equation \( C_6H_5N_2^+Cl^- \overset{Cu_2Cl_2/HCl}{\rightarrow} C_6H_5Cl \), we will analyze the reaction step by step.

### Step 1: Identify the Reactants
The reactants in the equation are:
- \( C_6H_5N_2^+ \): This is an aryl diazonium ion.
- \( Cl^- \): This is a chloride ion.

**Hint:** Aryl diazonium ions are often involved in reactions to form aryl halides.

### Step 2: Identify the Reaction Conditions
The reaction occurs in the presence of:
- \( Cu_2Cl_2 \): Copper(I) chloride, which acts as a reagent to facilitate the substitution.
- \( HCl \): Hydrochloric acid, which provides the chloride ions necessary for the reaction.

**Hint:** The presence of copper salts often indicates a coupling or substitution reaction involving diazonium compounds.

### Step 3: Determine the Product
The product formed from this reaction is:
- \( C_6H_5Cl \): This is chlorobenzene, an aryl halide.

**Hint:** Aryl diazonium salts typically react to form aryl halides when treated with halide ions in the presence of copper salts.

### Step 4: Identify the Type of Reaction
This reaction is a classic example of the Sandmeyer reaction. In the Sandmeyer reaction, aryl diazonium salts are converted into aryl halides using copper(I) halides.

**Hint:** Look for reactions involving diazonium salts that lead to the formation of halogenated aryl compounds.

### Conclusion
The reaction \( C_6H_5N_2^+Cl^- \overset{Cu_2Cl_2/HCl}{\rightarrow} C_6H_5Cl \) is known as the **Sandmeyer reaction**.

**Final Answer:** Sandmeyer reaction.