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2005
Structure
D 2000
11- 008
Ca(AsF3)(AsF6)2: The First Alkaline Earth Metal Cation Coordinated to AsF3.
— The title compound is prepared by reaction of CaF2 with excess AsF 5 in AsF 3 solvent
(-196→20 °C, several days, 99% yield). Ca(AsF3)(AsF6)2 crystallizes in the orthorhombic space group Pnma with Z = 4 (single crystal XRD). It is found that the AsF3
molecules serve as bridging ligand between two metal cations with F—Ca bridging
distances of 241.1 and 243.2 pm. The As—F bond of the bridging F atoms (172.4 and
173.1 pm) are shorter than the terminal As—F bond (184.5 pm). — (TRAMSEK*,
M.; ZEMVA, B.; J. Fluorine Chem. 125 (2004) 12, 1919-1924; Dep. Inorg. Chem.
Technol., Jozef Stefan Inst., 1000 Ljubljana, Slovenia; Eng.) — Schramke
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