The Reaction of lodoazoxybenzenes with Sulfuric and Chlorosulf uric Acid

Abstract

In the reaction of some iodoazoxybenzenes with 90% sulfuric acid and chlorosulfuric acid, the corresponding iodoazobenzenes were obtained as a main product. When azoxybenzene itself and 2, 2'-dihaloazoxybenzenes other than the diiodo compounds were treated with 90% sulfuric acid, the 4-hydroxyazobenzenes were obtained in more than 40% yield.2-Hydroxyazobenzenes were detected as a sole products under UV irradiation of iodoazoxybenzenes. Some iodoazoxybenzene-SbCl₅ (1: 1) complexes, were stable to thermolysis.