Which of the following is the most stable carbocation here ?

Options

A.
B.
C.
D.

Answer

To determine which of the given carbocations is the most stable, we need to analyze the degree of each carbocation present in the options. The stability of carbocations generally follows this order:

1. Tertiary (3°) carbocation - most stable
2. Secondary (2°) carbocation - moderately stable
3. Primary (1°) carbocation - least stable

### Step-by-Step Solution:

1. **Identify the Carbocation Types**:
- Examine each option to determine whether the carbocation is primary (1°), secondary (2°), or tertiary (3°).

2. **Analyze Each Option**:
- **Option 1**: The carbon atom with the positive charge is attached to one other carbon atom. This is a primary (1°) carbocation.
- **Option 2**: The carbon atom with the positive charge is attached to two other carbon atoms. This is a secondary (2°) carbocation.
- **Option 3**: The carbon atom with the positive charge is attached to one other carbon atom. This is also a primary (1°) carbocation.
- **Option 4**: The carbon atom with the positive charge is attached to one other carbon atom. This is again a primary (1°) carbocation.

3. **Determine Stability**:
- From the analysis, we find:
- Options 1, 3, and 4 are primary (1°) carbocations.
- Option 2 is a secondary (2°) carbocation.
- According to the stability order, secondary carbocations are more stable than primary carbocations.

4. **Conclusion**:
- Since option 2 is the only secondary carbocation and all other options are primary, option 2 is the most stable carbocation among the given choices.

### Final Answer:
**Option 2 is the most stable carbocation.**