Which of the following is the arranged more stable carbocation of the given species ?
`CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-overset(o+)CH-CH_(3)to`

Options

A. `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-underset(o+)CH-CH_(3)`
B. `CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-CH_(2)-overset(o+)CH_(2)`
C. `CH_(3)-underset(o+)overset(CH_(3))overset(|)C-overset(CH_(3))overset(|)(CH)-CH_(3)`
D. `CH_(3)-overset(CH_(3))overset(|)C-underset(CH_(3))underset(|)(CH)-overset(o+)CH_(2)`

Answer

To determine the most stable carbocation from the given species, we will analyze the structure and stability of the carbocation.

### Step-by-Step Solution:

1. **Identify the Carbocation**:
The given structure is a secondary carbocation (2°) where the positive charge is on a carbon atom that is bonded to two other carbon atoms.

2. **Understanding Carbocation Stability**:
Carbocations are classified based on their degree:
- Primary (1°) - bonded to one carbon
- Secondary (2°) - bonded to two carbons
- Tertiary (3°) - bonded to three carbons
Tertiary carbocations are the most stable due to hyperconjugation and inductive effects.

3. **Convert to Tertiary Carbocation**:
To increase the stability of the carbocation, we can attempt to convert the secondary carbocation into a tertiary carbocation. This can be done by shifting a methyl group from a neighboring carbon to the positively charged carbon.

4. **Methyl Group Shift**:
If we shift a methyl group from one of the adjacent carbons to the carbon with the positive charge, we can create a tertiary carbocation. This is done as follows:
- Identify a methyl group adjacent to the carbocation and move it to the carbocation center.

5. **Resulting Structure**:
After the methyl group shift, the new structure will have the positive charge on a carbon that is now bonded to three other carbon atoms, making it a tertiary carbocation.

6. **Conclusion**:
The resulting tertiary carbocation is more stable than the original secondary carbocation due to increased hyperconjugation and inductive stabilization.

### Final Answer:
The most stable carbocation among the given species is the tertiary carbocation formed after the methyl group shift.

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