By treating toluene with chromyl chloride in CCl4 and decomposing the complex with water, the reaction is named as –

Options

A. Etard reaction
B. Sandmeyer’s reaction
C. Schotten Baumann reaction
D. Stephen’s reaction

Answer

To solve the question regarding the reaction of toluene with chromyl chloride in CCl4 and the subsequent decomposition with water, we can break down the process step-by-step:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are toluene (C6H5CH3) and chromyl chloride (CrO2Cl2) in carbon tetrachloride (CCl4).

2. **Formation of the Complex**:
- When toluene reacts with chromyl chloride, a complex is formed. The methyl group (CH3) of toluene interacts with the chromium atom in chromyl chloride, leading to the formation of a chromyl complex. This complex can be represented as C6H5-CH(OH)-CrCl2.

3. **Decomposition of the Complex**:
- The complex formed is then treated with water (H2O). The oxygen in the complex has a lone pair of electrons, which allows it to interact with water, leading to the hydrolysis of the complex.

4. **Formation of Benzaldehyde**:
- The hydrolysis results in the formation of benzaldehyde (C6H5CHO) and chromium byproducts. The reaction can be summarized as:
\[ \text{C6H5-CH3} + \text{CrO2Cl2} \xrightarrow{\text{CCl4}} \text{C6H5-CHO} + \text{Cr byproducts} \]

5. **Naming the Reaction**:
- This specific reaction is known as the **Etard Reaction**. It is characterized by the oxidation of toluene to benzaldehyde using chromyl chloride.

### Final Answer:
The reaction is named as the **Etard Reaction**.

---