Which of the following alkane can be obtained in good yield by the Wurtz reaction?

Options

A.
B.
C. `CH_(3)-CH_(2)-CH_(3)`
D.

Explanation

To determine which alkane can be obtained in good yield by the Wurtz reaction, we need to understand the mechanism and requirements of this reaction. The Wurtz reaction involves the coupling of two alkyl halides in the presence of sodium, typically in dry ether, to form a higher alkane. Here’s a step-by-step solution:

### Step 1: Understand the Wurtz Reaction
The Wurtz reaction is a coupling reaction where two alkyl halides react with sodium to form an alkane. The general reaction can be represented as:
\[ 2 R-X + 2 Na \rightarrow R-R + 2 NaX \]
where \( R \) is the alkyl group and \( X \) is a halogen.

### Step 2: Identify the Symmetry of the Alkanes
In the context of the Wurtz reaction, the symmetry of the alkane is crucial. A symmetric alkane can be formed from a single type of alkyl halide, while an asymmetric alkane typically requires two different alkyl halides. We need to analyze the given options for symmetry.

### Step 3: Analyze Each Option
1. **Option A**: Check if it is symmetric. If it is asymmetric, it will not yield a good product.
2. **Option B**: Check for symmetry. If it can be divided into two equal halves, it can be formed from one alkyl halide and will yield well.
3. **Option C**: Similar analysis as above. Check for symmetry.
4. **Option D**: Again, check for symmetry.

### Step 4: Determine the Best Option
After analyzing each option:
- **Option A**: Asymmetric, not a good yield.
- **Option B**: Symmetric, can be formed from one alkyl halide, good yield.
- **Option C**: Asymmetric, not a good yield.
- **Option D**: Asymmetric, not a good yield.

### Conclusion
The alkane that can be obtained in good yield by the Wurtz reaction is **Option B**.