Oxidative Anion Metatheses in Diaryliodonium Iodides and Chlorides

Article abstract of DOI:10.1246/bcsj.70.219

Oxidative anion metatheses in the crude title iodides and chlorides produced the corresponding pure hydrogensulfates, nitrates, tetrafluoroborates, triflates, tosylates, as well as bromides and chlorides (only from the iodides) in 54-86% yields. These procedures are easier and shorter than earlier methods. By using modified oxidative metatheses in the title iodides (in the presence of HBr or HCl) it was possible either to isolate, or to detect only, the intermediate dihaloiodates(I). [Ar₂I]⁺[IX₂]^- (X = Br or Cl). A complex Ph₂I⁺Cl^- -1/2I₂ was also obtained in 56% yield. Tetraethylammonium iodide was similarly converted into pure tetrafluoroborate or dibromoiodate(I) in 75 and 76% yields, respectively.