Which of the following can be made by using Williamson's synthesis?

Options

A. `C_(2) H_(2) OH + H_(2) SO_(4) to `
B. `C_(2) H_(5) OH + Al_(2) O_(3) to `
C. `C_(2) H_(5) Cl+ C_(2) H_(5) Ona to`
D. `C_(2) H_(5) Cl+ Ag_(2) O to `

Answer

**Step-by-Step Solution:**

1. **Understanding Williamson's Synthesis**:
Williamson's synthesis is a method used to prepare ethers. It involves the reaction of an alkyl halide with a deprotonated alcohol (alkoxide ion). The general reaction can be represented as:
\[ R-X + R'-O^- \rightarrow R-O-R' + X^- \]
where \( R-X \) is the alkyl halide, \( R'-O^- \) is the alkoxide ion, and \( R-O-R' \) is the ether formed.

2. **Identifying the Reactants**:
To utilize Williamson's synthesis, we need to identify an appropriate alkyl halide and a corresponding deprotonated alcohol (alkoxide). The alkoxide is typically formed by deprotonating an alcohol using a strong base (like sodium hydride or sodium metal).

3. **Analyzing the Options**:
We need to look at the provided options to identify which one can be synthesized using Williamson's synthesis. We will check each option to see if it can be formed by the reaction of an alkyl halide with an alkoxide.

4. **Example Reaction**:
As an example, consider the reaction:
\[ C_2H_5Cl + C_2H_5O^- \rightarrow C_2H_5O-C_2H_5 + NaCl \]
This shows that ethyl chloride reacts with sodium ethoxide to form diethyl ether.

5. **Conclusion**:
After analyzing the options, we find that option 3 follows the same reaction pattern as the example provided. Therefore, the correct answer is option 3, which can be made by Williamson's synthesis.

**Final Answer**: Option 3 can be made by using Williamson's synthesis.

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