A new method for the preparation of Ru(IV) in non-complexing acid medium: Evidence for tetrameric Ru(IV)

Abstract A new method for the preparation of Ru(IV) in acid solutions is described. This method, avoiding the preparation of the highly reactive RuO 4 , is based on the stoichiometric oxidation of Br − ion of K 2 RuBr 6 by BrO 3 − ion. Easy to control and reproducible the process leads to solutions of a well-known composition consisting of the tetrameric Ru(IV) ion.