Darstellung und Schwingungsspektren von Fluoro-Chloro- Platinaten(IV) einschließlich der Stereoisomeren / Preparation and Vibrational Spectra of Fluoro-Chloro-Platinates(IV) Including Stereoisomers

Abstract

The reaction of [PtCI6]2- with BrF3 generates the mixed complexes [PtFnC6-n]2- , n = 1- 5, of which the species with n = 2. 3, 4 are cis-configurated. Due to the stronger trans-effect of Cl compared to F, on treatment of [PtF5Cl]2- and cis-[PtF4Cl2]2- with Cl- the trans-isomers are formed stereospecifically. The pure fluoro-chloro-platinates(IV) are separated by ion exchange chromatography on diethylaminoethyl-cellulose. The vibrational spectra o f the mixed ligand complexes are completely assigned according to point groups D4h, C4v, C3v and C2v. The Pt-Cl stretching vibrations of [PtF5Cl]2-, trans-[PtF4Cl2]2-, mer-[PtF3Cl3]2- and [PtFCl5]2- are split by the isotopes 35Cl and 37Cl, showing well resolved sharp Raman lines in the expected ratio of intensities.