Which among the following reagents convert alkyl halide into alkane ?

Options

A. `Bu_3SnH`
B. Na/dry ether
C. `R_2CuLi`
D. All of these

Answer

To determine which reagents can convert alkyl halides into alkanes, we will analyze each reagent mentioned in the question step by step.

### Step 1: Understanding the Reagents

1. **Bu3SnH (Tributyltin Hydride)**:
- This is a reducing agent that can reduce alkyl halides to alkanes.
- When an alkyl halide (like bromocyclohexane) is treated with Bu3SnH in the presence of light, the halide is replaced by hydrogen, yielding the corresponding alkane (cyclohexane).

**Hint**: Look for reducing agents that can replace halides with hydrogen.

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### Step 2: Wurtz Reaction with Na in Dry Ether

2. **Na in Dry Ether**:
- This reagent is involved in the Wurtz reaction.
- In this reaction, alkyl halides react with sodium metal in dry ether to form alkanes.
- The process involves the formation of an alkyl radical which then combines with another alkyl halide to form an alkane.

**Hint**: Identify reactions that involve sodium and ether for alkyl halide transformations.

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### Step 3: R2CuLi (Gilman Reagent)

3. **R2CuLi (Gilman Reagent)**:
- This reagent is used in the Corey-House reaction.
- It reacts with alkyl halides to form alkanes.
- The mechanism involves the nucleophilic attack of the R2CuLi on the alkyl halide, displacing the halide and forming the alkane.

**Hint**: Recognize reagents that facilitate nucleophilic substitutions to yield alkanes.

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### Conclusion

After analyzing all the reagents, we find that:

- **Bu3SnH** reduces alkyl halides to alkanes.
- **Na in Dry Ether** (Wurtz reaction) converts alkyl halides to alkanes.
- **R2CuLi** (Corey-House reaction) also converts alkyl halides to alkanes.

Thus, all three reagents can convert alkyl halides into alkanes.

### Final Answer:
The correct answer is **option four: all of these**.

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