Tetraalkylammonium and pyridinium dichloro-and dibromoiodates (I) were efficiently prepared from iodine and tetralkylammonium chloride or pyridine by oxidation with hydrogen peroxide in the presence of an equimolar amount of a hydrogen halide. Their halogenating activity was tested on 1, 3-dimethoxybenzene and styrene as model substrates. The results show that ICl2− salts acted as iodinating reagents, while IBr2− ...
