b) Write the mechanism of Friedel-Craft’s alkylation. What are its limitations?

Friedel-Crafts alkylation is a widely used method in organic chemistry to introduce alkyl substituents onto aromatic rings. The mechanism involves the electrophilic substitution of an alkyl group onto an aromatic ring catalyzed by a Lewis acid, typically aluminum chloride (\(AlCl_3\)) or ferric chloride (\(FeCl_3\)). Here's a simplified mechanism:

1. Formation of the Electrophile: The alkyl halide (R-X) reacts with the Lewis acid catalyst to form a complex in which the halogen is activated as ___ ________ ________ _____ __________ ___ ______ _______ ___ _________.
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