The reaction `Aroverset(+)(N_(2))Cl overset(Cu//HCl)to ArCl+N_(2)+CuCl` is named as….

Options

A. Sandmeyer reaction
B. Gattermann reaction
C. Claisen reaction
D. Carbylamine reaction

Explanation

To solve the question regarding the reaction of benzene diazonium chloride with copper and hydrochloric acid, we need to identify the name of the reaction. Here’s a step-by-step breakdown:

### Step 1: Identify the Reactants
The reactants in the given reaction are:
- Benzene diazonium chloride (ArN₂Cl)
- Copper (Cu)
- Hydrochloric acid (HCl)

### Step 2: Understand the Reaction
When benzene diazonium chloride reacts with copper in the presence of hydrochloric acid, the products formed are:
- Aryl chloride (ArCl)
- Nitrogen gas (N₂)
- Copper(I) chloride (CuCl)

### Step 3: Analyze the Type of Reaction
This reaction involves the substitution of the diazonium group (N₂) with a chlorine atom to form an aryl halide. The presence of copper as a catalyst is significant in this reaction.

### Step 4: Compare with Known Reactions
We need to compare this reaction with known reactions:
- **Sandmeyer Reaction**: Involves the use of copper salts (e.g., CuCl or CuBr) to substitute the diazonium group with a halogen.
- **Gatterman Reaction**: Involves the use of copper and HCl to convert diazonium salts into aryl halides.

### Step 5: Determine the Correct Name
Since the reaction uses copper as a catalyst and hydrochloric acid to produce aryl chloride, it matches the description of the Gatterman reaction rather than the Sandmeyer reaction.

### Conclusion
The name of the reaction is **Gatterman Reaction**.

### Final Answer
**Gatterman Reaction**

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