When benzenediazonium chloride is heated with fluoro boric acid, fluorobenzene is formed. This reaction is called

Options

A. Balz Schiemann reation
B. Gattermann reaction
C. Sandmeyer reaction
D. Hoffmann bromamide reaction

Answer

To solve the question regarding the reaction of benzenediazonium chloride with fluoro boric acid to form fluorobenzene, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are benzenediazonium chloride (C6H5N2Cl) and fluoro boric acid (HBF4).

2. **Understand the Reaction**:
- When benzenediazonium chloride is heated with fluoro boric acid, it undergoes a substitution reaction where the diazonium group (N2) is replaced by a fluorine atom (F).

3. **Product Formation**:
- The product formed from this reaction is fluorobenzene (C6H5F), which has a fluorine atom substituted for the diazonium group.

4. **Name the Reaction**:
- This specific reaction is known as the Balsch-Kiemann reaction. It is a method for introducing fluorine into an aromatic compound using diazonium salts.

5. **Conclusion**:
- Therefore, the reaction of benzenediazonium chloride with fluoro boric acid to form fluorobenzene is called the Balsch-Kiemann reaction.

### Final Answer:
The reaction is called the **Balsch-Kiemann reaction**.

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