Bromination of p-bromophenol. II. Catalysis by iodine and anhydrous aluminium chloride

Abstract

The phenomenon of catalytic maximum has been investigated in the bromination of p-bromophenol (ArH) using iodine and anhydrous aluminium chloride as catalysts. The effective catalysts have been shown to be iodine bromide in acetic acid and carbon tetrachloride media, and AlCl₃,Br₂ in acetic acid. A correlation between the ratio of the reactants at the catalytic maximum, and the order in the effective catalyst has been deduced and experimentally verified.