OXIDATIVE ANION METATHESES IN DIARYLIODONIUM IODIDES AND CHLORIDES

Oxidative anion metatheses in the crude title iodides and chlorides pr oduced the corresponding pure hydrogensulfates, nitrates, tetrafluorob orates, triflates, tosylates, as well as bromides and chlorides (only from the iodides) in 54-86% yields. These procedures are easier and sh orter than earlier methods. By using modified oxidative metatheses in the title iodides (in the presence of HBr or HCl) it was possible eith er to isolate, or to detect only, the intermediate dihaloiodates(I), [ Ar2I](+)[IX(2)](-) (X = Br or Cl). A complex Ph(2)I(+)Cl(-) . 1/2I(2) was also obtained in 56% yield. Tetraethylammonium iodide was similarl y converted into pure tetrafluoroborate or dibromoiodate(I) in 75 and 76% yields, respectively.