Which of the following reactions can be employed for getting odd carbon alkanes in good yield ?

Options

A. Wurtz reaction
B. Corey-House reaction
C. Both
D. None of these

Explanation

To determine which reaction can be employed for obtaining odd carbon alkanes in good yield, we will analyze both the Woods reaction and the Corey-House reaction.

### Step-by-Step Solution:

1. **Understanding the Woods Reaction**:
- The Woods reaction involves the coupling of two alkyl halides in the presence of sodium (Na) and dry ether.
- The general reaction can be represented as:
\[ R-X + R'-X + 2Na \xrightarrow{\text{dry ether}} R-R' + 2NaX \]
- This reaction typically produces symmetrical alkanes, which means that the resulting alkanes have an even number of carbon atoms.

2. **Limitations of the Woods Reaction**:
- When two identical alkyl halides are used, the product is a symmetrical alkane.
- If two different alkyl halides are used, a mixture of products is obtained, including symmetrical and unsymmetrical alkanes. However, the yield of odd-numbered carbon alkanes is not favorable.

3. **Understanding the Corey-House Reaction**:
- The Corey-House reaction also involves the coupling of alkyl halides but uses lithium reagents.
- The general reaction can be represented as:
\[ R-X + 2Li \xrightarrow{\text{dry ether}} R-Li + LiX \]
- This is followed by the reaction of lithium dialkylcopper with another alkyl halide:
\[ 2R-Li + CuI \rightarrow R_2CuLi + LiI \]
- The lithium dialkylcopper can then react with another alkyl halide to produce unsymmetrical alkanes.

4. **Yield of Odd Carbon Alkanes**:
- The Corey-House reaction is particularly useful for generating unsymmetrical alkanes, including those with odd numbers of carbon atoms.
- This reaction allows for the combination of different alkyl groups, leading to a better yield of odd carbon alkanes.

5. **Conclusion**:
- Based on the analysis, the Corey-House reaction is the preferred method for obtaining odd carbon alkanes in good yield, as it allows for the formation of unsymmetrical alkanes.

### Final Answer:
The Corey-House reaction can be employed for getting odd carbon alkanes in good yield.

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