The major product obtained when isobutane is treated with chlorine in the presence of diffused sun light is

Options

A. isobutylchloride
B. n-Butylchoride
C. tert.Butylchloride
D. sec-Butylchloride

Explanation

To determine the major product obtained when isobutane is treated with chlorine in the presence of diffused sunlight, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of Isobutane**:
Isobutane, also known as 2-methylpropane, has the molecular formula C4H10. Its structure can be represented as:
```
CH3
|
CH3 - C - CH2 - CH3
|
CH3
```

2. **Understand the Reaction Conditions**:
The reaction occurs under photochemical conditions, meaning that it involves light (in this case, diffused sunlight). This promotes the reaction between isobutane and chlorine (Cl2).

3. **Mechanism of Chlorination**:
The chlorination of alkanes proceeds through a radical mechanism, which includes initiation, propagation, and termination steps. In the presence of light, chlorine molecules dissociate into two chlorine radicals (Cl•).

4. **Formation of Radicals**:
The chlorine radicals can abstract hydrogen atoms from isobutane, leading to the formation of isobutyl radicals. The most stable radical formed will lead to the major product.

5. **Identify the Major Product**:
Isobutane has three types of hydrogen atoms: primary (attached to terminal carbons) and tertiary (attached to the central carbon). The tertiary hydrogen is more reactive due to the stability of the resulting tertiary radical. When one of the tertiary hydrogens is replaced by chlorine, the major product formed is:
```
CH3
|
CH3 - C - Cl
|
CH3
```
This compound is known as **Tertiary butyl chloride** (or 2-chloro-2-methylpropane).

6. **Minor Product Formation**:
While the major product is tertiary butyl chloride, minor products can also form if chlorine radicals abstract primary hydrogens. However, these products are less stable and less favored compared to the major product.

7. **Conclusion**:
The major product obtained from the reaction of isobutane with chlorine in the presence of diffused sunlight is **Tertiary butyl chloride**.

### Final Answer:
The major product is **Tertiary butyl chloride**.

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