Cationic and anionic complexes of the noble gases

2 – Preparative Methods

KrF2/MnF4 adducts from KrF2/MnF2 interaction in HF as a route to high purity MnF4

XeF2·2CrF4 was prepared by solvolysis of XeF2·CrF4 in anhydrous hydrogen fluoride (aHF) and subsequent decantation of the majority of dissolved XeF2 in aHF. Remaining XeF2 and a large excess of CrF4 form XeF2·2CrF4 after aHF is removed. Ruby-red single crystals were obtained either by heating the sample in a thermal gradient or by recrystallization in supercritical SF6. The compound crystallizes in the triclinic space group P1 with a = 855.1(3) pm, b = 922.1(3) pm, c = 1043.8(3) pm, α = 76.02(2)°, β = 81.36(2)°, γ = 88.08(3)°, and Z = 4 at 293 K. The basic structural unit is formed by four independent Cr atoms, each octahedrally coordinated by six F atoms. Two fluorine ligands are provided by two different XeF2 molecules. The distorted octahedra are connected via common F atoms to form a three-dimensional network. XeF5+CrF5- was prepared from XeF6 and CrF4 at room temperature or by the reaction of XeF6 and CrF5 at 333 K. Red single crystals were grown from the solution of XeF5+CrF5- in aHF. The compound ...

J. Zupan

Papers

On the xenon hexafluoride-chromium tetrafluoride compound

On the XeMnF6 synthesis