Select the most stable carboncation among the following -

Options

A.
B.
C.
D.

Answer

To determine the most stable carbocation among the given options, we need to analyze the structure and degree of each carbocation. Here’s a step-by-step breakdown:

### Step 1: Understand Carbocation Stability
Carbocations are positively charged carbon species that are electron-deficient. Their stability is influenced by the number of alkyl groups attached to the positively charged carbon. The more alkyl groups attached, the more stable the carbocation due to hyperconjugation and inductive effects.

### Step 2: Identify the Degree of Each Carbocation
1. **Primary Carbocation (1°)**: A carbocation with one alkyl group attached. It is the least stable.
2. **Secondary Carbocation (2°)**: A carbocation with two alkyl groups attached. It is more stable than a primary carbocation.
3. **Tertiary Carbocation (3°)**: A carbocation with three alkyl groups attached. It is the most stable due to maximum hyperconjugation and inductive effects.

### Step 3: Analyze the Given Options
- **Option A**: 2° Carbocation (two alkyl groups)
- **Option B**: 1° Carbocation (one alkyl group)
- **Option C**: 3° Carbocation (three alkyl groups)
- **Option D**: 1° Carbocation (one alkyl group)

### Step 4: Compare Stability
From the analysis:
- **Option A (2°)** is more stable than **Option B (1°)** and **Option D (1°)**.
- **Option C (3°)** is the most stable because it has three alkyl groups.

### Conclusion
The most stable carbocation among the options is **Option C**, which is a tertiary carbocation.