Question:medium
Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
Updated On: Jan 19, 2026
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Solution and Explanation
Answer:
A Lewis acid other than anhydrous aluminium chloride that can be used during ethylation of benzene is:
Anhydrous ferric chloride (FeCl3)
Explanation:
Lewis acids are required in Friedel–Crafts alkylation reactions to generate the electrophile. Anhydrous ferric chloride (FeCl3) acts as a Lewis acid by accepting an electron pair and facilitates the formation of the ethyl carbocation, similar to AlCl3.
Other acceptable Lewis acids:
- Anhydrous zinc chloride (ZnCl2)
- Boron trifluoride (BF3)
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