Statement-1 : Friedel-crafts reaction between benzene and acetic anhydride in the presence of anhydrous AlCl3 yields acetophenone and not poly substituted products.
Statement-2 : Acetophenone formed, poisons the catalyst preventing further reaction.
Statement-1 is true but Statement-2 is false.
Correct R: CH3CO group in acetophenone being electron-withdrawing reduces the electron density in the benzene ring, thereby preventing further electrophilic substitution.