Question

In which of the following reactions, major product is matched correctly?

• A.
• B.
• C.
• D.

Hint:

In nucleophilic substitution reactions, identify the nucleophile and electrophile correctly. The nucleophile will replace the leaving group (halide ion) in the process. Ensure the correct product is identified based on the reagents used.

Answer 1

The Correct Option is C

This question concerns nucleophilic substitution reactions. Each option is analyzed to identify the correct major product.

1. Option 1: \( O\text{Na}^+ + \text{EtBr} \longrightarrow \text{OMe} \). This is incorrect. The nucleophile \( O\text{Na}^+ \) does not yield \( \text{OMe} \) when reacted with \( \text{EtBr} \). The expected product is \( \text{OEt} \), which conflicts with the stated reaction.

2. Option 2: \( \text{t-ButO}^-\text{Na}^+ + \text{EtBr} \longrightarrow \text{t-ButO}-\text{Et} \). This is incorrect. While \( \text{t-ButO}^- \) (tert-butoxide) undergoes nucleophilic substitution with \( \text{EtBr} \) to form \( \text{t-ButO}-\text{Et} \), this is not the major product typically observed in such reactions.

3. Option 3: \( O\text{Na}^+ + \text{nPrBr} \longrightarrow \text{O-nPr} \). This is the correct answer. The nucleophile \( O\text{Na}^+ \) reacts with \( \text{nPrBr} \) (n-propyl bromide) via nucleophilic substitution, displacing the bromide ion to form \( \text{O-nPr} \), which is the expected major product.

4. Option 4: \( \text{Sec ButO}K^+ + \text{EtBr} \longrightarrow \text{Sec But} - \text{OEt} \). This is incorrect. The expected product is \( \text{Sec ButO}-\text{Et} \), but its formation is unlikely under these reaction conditions and expected reaction type.

Therefore, Option 3 correctly matches the major product.