Question

The electrophile involved in the sulphonation of benzene is

• A. SO\(_3^+\)
• B. SO\(_3^{2-}\)
• C. H\(_3\)O\(^+\)
• D. SO\(_3\)

Hint:

SO\(_3\) is a strong electrophile due to electron-deficient sulfur.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Sulphonation uses SO\(_3\) as electrophile.
Step 2: Detailed Explanation:
2H\(_2\)SO\(_4\) \(\rightarrow\) SO\(_3\) + H\(_3\)O\(^+\) + HSO\(_4^-\)
SO\(_3\) attacks benzene ring.
Step 3: Final Answer:
Electrophile is SO\(_3\).