Consider the following compounds :
`CH_(4),CH_(3)-CH_(3), CH_(3)OH, CH_(3)-CH_(2)-CH_(3),CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(3)`
`H_(3)C-overset(CH_(3))overset("| ")"CH"-CH_(3),H_(3)C-overset(CH_(3))overset("| ")"CH"-overset(CH_(3))overset("| ")"CH"-CH_(3)`
How many compounds can be prepared by Wurtz reaction in high yields?

Answer

To determine how many compounds from the given list can be prepared by the Wurtz reaction in high yields, we first need to understand the nature of the Wurtz reaction. The Wurtz reaction involves the coupling of alkyl halides in the presence of sodium metal, typically yielding symmetrical alkanes or alkanes with an even number of carbon atoms.

Let's analyze each compound:

1. **Methane (CH₄)**: This is a one-carbon compound. The Wurtz reaction is not suitable for producing one-carbon alkanes.
- **Conclusion**: Cannot be prepared.

2. **Ethane (C₂H₆)**: Ethane can be produced from two methyl halides (CH₃Br) through the Wurtz reaction. It has an even number of carbon atoms.
- **Conclusion**: Can be prepared.

3. **Methyl Alcohol (CH₃OH)**: This is an alcohol, not an alkane, and cannot be produced via the Wurtz reaction.
- **Conclusion**: Cannot be prepared.

4. **Propane (C₃H₈)**: Propane has three carbon atoms, which is an odd number. The Wurtz reaction is not efficient for odd-numbered alkanes.
- **Conclusion**: Cannot be prepared.

5. **n-Pentane (C₅H₁₂)**: Pentane has five carbon atoms, which is odd. Therefore, it is not suitable for the Wurtz reaction.
- **Conclusion**: Cannot be prepared.

6. **Isobutane (C₄H₁₀)**: Isobutane is a branched alkane and cannot be synthesized in high yield via the Wurtz reaction, which favors symmetrical products.
- **Conclusion**: Cannot be prepared.

7. **2,3-Dimethylbutane (C₈H₁₈)**: This compound can be formed from the coupling of two symmetrical alkyl halides (such as 2-bromobutane), making it suitable for the Wurtz reaction.
- **Conclusion**: Can be prepared.

Now, summarizing our findings:
- Compounds that can be prepared in high yields via the Wurtz reaction: Ethane and 2,3-Dimethylbutane.
- Total count: **2 compounds**.

### Final Answer:
**2 compounds can be prepared by Wurtz reaction in high yields.**