Wurtz reaction is used to unit

Options

A. two alkyl halides
B. two aryl halides
C. alkyl and aryl halides
D. two benzene units.

Explanation

**Step-by-Step Solution:**

1. **Understanding Wurtz Reaction:**
The Wurtz reaction is a coupling reaction that involves the reaction of alkyl halides with sodium metal. It is typically used to synthesize symmetrical alkanes.

2. **Reaction Conditions:**
The Wurtz reaction requires:
- Two moles of alkyl halide (R-X)
- One mole of sodium metal (Na)
- Anhydrous ether as a solvent (usually dry ether)

3. **Mechanism of the Reaction:**
- The sodium metal donates electrons to the alkyl halide, generating free radicals.
- These free radicals then couple together to form a new carbon-carbon bond, resulting in a symmetrical alkane.

4. **Product Formation:**
- The general reaction can be represented as:
\[ 2 \text{R-X} + 2 \text{Na} \rightarrow \text{R-R} + 2 \text{NaX} \]
- Here, R-R represents the symmetrical alkane formed, and NaX is the sodium halide byproduct.

5. **Limitations of Wurtz Reaction:**
- If different alkyl halides are used, a mixture of products can be formed instead of a single symmetrical alkane.
- The Wurtz reaction is specific to alkyl halides and does not apply to aryl halides.

6. **Comparison with Fitting Reaction:**
- While Wurtz reaction involves alkyl halides, the Fitting reaction involves the coupling of aryl halides (such as phenyl halides) and is not considered a Wurtz reaction.

7. **Conclusion:**
- The Wurtz reaction is primarily used to unite alkyl halides to form symmetrical alkanes.