`C_(6)H_(5)N_(2)Cl overset(KI)(to) ` This reaction is named as

Options

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

Answer

To solve the question regarding the reaction of C6H5N2Cl with KI, we will follow these steps:

### Step 1: Identify the Compound
The compound C6H5N2Cl is known as benzene diazonium chloride. It consists of a benzene ring (C6H5) attached to a diazonium group (N2) and a chloride ion (Cl).

**Hint:** Look for the functional groups in the compound to identify it correctly.

### Step 2: Understand the Reaction
When benzene diazonium chloride (C6H5N2Cl) reacts with potassium iodide (KI), it undergoes a substitution reaction. The iodide ion (I-) from KI replaces the diazonium group (N2) in the benzene ring.

**Hint:** Remember that diazonium salts are reactive and can undergo nucleophilic substitution reactions.

### Step 3: Write the Products
The reaction produces iodobenzene (C6H5I) and nitrogen gas (N2) as a byproduct. The potassium chloride (KCl) is also formed as a side product.

**Hint:** Keep track of the reactants and products to ensure you understand what is formed during the reaction.

### Step 4: Name the Reaction
This specific reaction, where a diazonium salt reacts with a halide (in this case, iodide) to form an aryl halide, is known as the Sandmeyer reaction.

**Hint:** Familiarize yourself with the names of reactions involving diazonium compounds to identify them correctly.

### Conclusion
Thus, the reaction of C6H5N2Cl with KI is known as the Sandmeyer reaction.

**Final Answer:** Sandmeyer reaction.