Friedel-Crafts Acylation

Question 1

Which catalyst is used for Friedel-Crafts Acylation?

Answer 1

AlCl3

Question 2

How is the acyl ion formed?

Answer 2

By mixing an acid chloride with an aluminum chloride catalyst.
RCOCL + AlCl3 —> RCO(+) + AlCl4(-)
AlCl3 is regenerated by H+ from the acylation of the benzene (electrophilic substitution).
AlCl4(-) + H+ –> AlCl3 + HCl

Question 3

What type of mechanism shows Friedel-Crafts Acylation?

Answer 3

Electrophilic substitution.