The compound X in the reaction X + Zn `" " rarr ` 3 -Hexene, is

Options

A. 3, 4-Dichlorohexane
B. 1, 1-Dichloropropane
C. Both (1) and (2)
D. None of the above

Answer

To determine the compound X in the reaction \( X + Zn \rightarrow 3 \text{-Hexene} \), we need to analyze the structure of 3-Hexene and identify a suitable precursor compound that can yield this product upon reaction with zinc.

### Step-by-Step Solution:

1. **Identify the Structure of 3-Hexene**:
- 3-Hexene is an alkene with a six-carbon chain and a double bond between the third and fourth carbon atoms. Its structure can be represented as:
\[ \text{CH}_3 - \text{CH}_2 - \text{C} = \text{C} - \text{CH}_2 - \text{CH}_3 \]

2. **Consider Possible Compounds for X**:
- The compound X must be a haloalkane that can undergo a reaction with zinc to eliminate halogen atoms and form a double bond.

3. **Evaluate the First Option: 3,4-Dichlorohexane**:
- The structure of 3,4-Dichlorohexane is:
\[ \text{CH}_3 - \text{CH}_2 - \text{C}(\text{Cl}) - \text{C}(\text{Cl}) - \text{CH}_2 - \text{CH}_3 \]
- When this compound reacts with zinc, the zinc will facilitate the elimination of the two chlorine atoms, forming 3-Hexene:
\[ \text{3,4-Dichlorohexane} + Zn \rightarrow 3 \text{-Hexene} + ZnCl_2 \]
- Therefore, this option is valid.

4. **Evaluate the Second Option: 1,1-Dichloropropane**:
- The structure of 1,1-Dichloropropane is:
\[ \text{CH}_3 - \text{C}(\text{Cl}) - \text{C}(\text{Cl}) - \text{CH}_2 \]
- In this case, when 1,1-Dichloropropane reacts with zinc, it would not yield a six-carbon alkene. Instead, it would lead to a different product, as the structure does not provide the necessary carbon framework to form 3-Hexene.

5. **Conclusion**:
- The only suitable compound X that can react with zinc to produce 3-Hexene is **3,4-Dichlorohexane**.

### Final Answer:
The compound X in the reaction \( X + Zn \rightarrow 3 \text{-Hexene} \) is **3,4-Dichlorohexane**.