Which of the following carbocations would not likely rearrange to more stable carbocation ?

Options

A.
B.
C.
D. none of these

Answer

To determine which carbocation would not likely rearrange to a more stable carbocation, we need to analyze the stability of different types of carbocations (primary, secondary, and tertiary) and their potential for rearrangement.

### Step-by-Step Solution:

1. **Understand Carbocation Stability**:
- Tertiary carbocations (3°) are the most stable due to hyperconjugation and inductive effects from surrounding alkyl groups.
- Secondary carbocations (2°) are less stable than tertiary but more stable than primary (1°).
- Primary carbocations (1°) are the least stable and are less likely to rearrange to a more stable form.

**Hint**: Remember the order of stability: Tertiary > Secondary > Primary.

2. **Identify the Carbocations**:
- Analyze the given carbocations in the question. Identify whether they are primary, secondary, or tertiary.

**Hint**: Look for the number of carbon atoms attached to the positively charged carbon atom.

3. **Evaluate Rearrangement Possibilities**:
- A primary carbocation can rearrange to a secondary carbocation if there is a possibility of a hydride or alkyl shift.
- A secondary carbocation can rearrange to a tertiary carbocation, which is more stable.
- A tertiary carbocation is already the most stable and typically does not rearrange.

**Hint**: Consider the possibility of shifts (hydride or alkyl) that would lead to a more stable carbocation.

4. **Determine Which Carbocation Does Not Rearrange**:
- If a carbocation is tertiary, it will not rearrange because it is already in its most stable form.
- If a carbocation is primary and cannot rearrange to a more stable form, it is also a candidate.

**Hint**: Focus on the carbocation that is either tertiary or a primary carbocation that lacks the ability to rearrange.

5. **Select the Correct Option**:
- Based on the analysis, identify which option corresponds to a carbocation that would not likely rearrange to a more stable carbocation.

**Hint**: Compare the stability of the carbocations and their potential for rearrangement based on the previous steps.

### Conclusion:
After analyzing the stability and potential rearrangements of the carbocations, the answer to the question is **Option B**, as it represents a carbocation that would not likely rearrange to a more stable carbocation.