Question

Why does Friedel craft acylation not show polymerization and rearrangement like Friedel Craft alkylation?

Answer 1

Answer:

Some limitations of Friedel-Crafts Alkylation

The rearrangements occur due to hydride shifts and methyl shifts. ... The reaction adds an electron donating alkyl group, which activates the benzene ring to further alkylation. This problem does not occure during Friedel-Crafts Acylation because an acyl group is deactivating.