Über Hexaiodoplatinate(IV) M2PtI6 (M = K, Rb, Cs, NH4, Tl) Darstellungsverfahren, Eigenschaften und Kristallstrukturen / On Hexaiodoplatinates(IV) M2PtI6 (M = K, Rb, Cs, NH4, Tl) -Preparation, Properties and Structural Data

Abstract

Crystals of hexaiodoplatinates(IV) M2PtIe (M = K, Rb, Cs, NH4, Tl) have been obtained by heating PtI4 or H2FtCl6 in highly concentrated aqueous solutions of MI in the presence of small amounts of HI and I2 in an ampoule for 24 h at 160 °C. The structural parameters were determined from single crystal data. In water less soluble compounds with M = Rb, Cs, NH4 show the cubic K2PtCl6 structure, whereas the easily water soluble salts with M = K, Tl both crystallize in a tetragonally distorted version of this structure type.