The major product of the following reaction is:
`CH_(3)-CH=CH_(2)+HBr overset((C_(6)H_(5)CO)_(2)O_(2)" peroxide")(to)`

Options

A. `CH_(3)-CH_(2)-CH_(2)-Br`
B. `CH_(2)CH(Br)-CH_(3)`
C. `BrCH_(2)-CH=CH_(2)`
D.

Explanation

To determine the major product of the reaction between propene (CH₃-CH=CH₂) and HBr in the presence of peroxides, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactants are propene (CH₃-CH=CH₂) and HBr, and the reaction occurs in the presence of peroxides.

2. **Understand the Role of Peroxides**: The presence of peroxides indicates that the reaction will follow a free radical mechanism, known as the peroxide effect. This is different from the typical electrophilic addition mechanism.

3. **Homolytic Cleavage of HBr**: In the presence of peroxides, HBr will dissociate into H• (hydrogen radical) and Br• (bromine radical).

4. **Formation of Radicals**: The double bond in propene will undergo homolytic cleavage, allowing the formation of radicals. The H• radical can add to one of the carbons in the double bond, leading to the formation of a more stable radical.

5. **Stability of Radicals**: The stability of the radicals formed is crucial. The radical formed by adding H• to the terminal carbon (C1) of propene will yield a more stable secondary radical (CH₃-CH•-CH₂) compared to the radical formed by adding to the middle carbon (C2).

6. **Radical Addition**: The Br• radical will then add to the more stable radical (CH₃-CH•-CH₂), resulting in the final product.

7. **Final Product**: The major product formed from this reaction is 1-bromopropane (CH₃-CH₂-CH₂Br).

### Final Answer:
The major product of the reaction is **1-bromopropane (CH₃-CH₂-CH₂Br)**.

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