Identify whether each of the following compounds can be made using a direct friedel Crafts Alkylation or whether it is necessary to perform an acylation followed by a Clemenson reduction to avoid carbocation rearrangements The following compound cannot be made with either Friedel Crafts alkylation or acylation, Explain A friedel Crafts Acylation is an aromatic substitution in which the electrophile [E+] is an acylium ion. There are other methods of forming acylium ions, such as treatment of an anhydride with a Lewis acid. The resulting acylium ion can also be attacked by benzene ring resulting in acylation of aromatic ring. With this in mind draw a mechanism for the following transformation.