Darstellung von trans-[PtCl4Br2] 2 -und [PtCl5Br] 2- durch oxidative Addition an [PtCl4]2-/Preparation of trans-[PtCl4Br2] 2--and [PtCl5Br] 2 -by Oxidative Addition to [PtCl4]2-

Abstract

Abstract The oxidative addition of Br2 to [PtCl4]2-in HBr yields almost pure trans-[PtCl4Br2]2-, in HCl nearly pure [PtCl5Br]2-, and in CH2Cl2 by a quantitative and stereospecific reaction completely pure trans-[PtCl4Br2]2-. This is confirmed by ion exchange chromatography on diethylaminoethyl cellulose and by analysis of the vibrational spectra in comparison with the IR and Raman spectra of the well-known species of the series [PtClnBr6-n]2- , n = 0-6. The literature concerning trans-[PtCl4Br2]2- and other mixed ligand complexes is critically discussed.