 | |
 | |
| Names | |
|---|---|
| IUPAC name Rhodium(V) fluoride | |
| Identifiers | |
3D model (JSmol) |
|
| |
| |
| Properties | |
| F5Rh | |
| Molar mass | 197.89751 g·mol−1 |
| Appearance | Red solid |
| Density | 3.95 g cm3 |
| Structure | |
| Monoclinic | |
| P21/a | |
a = 12.338,b = 9.9173,c = 5.5173 α = 90°, β = 100.42°, γ = 90° | |
Lattice volume (V) | 663.85 |
Formula units (Z) | 8 |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Rhodium pentafluoride is aninorganic compound with the formula Rh4F20. It is a red solid. It is prepared by fluorination of rhodium trifluoride at 400 °C.[1]
According to X-ray crystallography, the Rh centers are octahedral. The structure is very similar to that of the relatedruthenium pentafluoride,osmium pentafluoride, andiridium pentafluoride. All are tetrameric, meaning that they have the molecular structure [MF5]4. The M-F distances for thebridging fluoride ligands are typically about 0.2 Å longer than the Rh-F distances for the nonbridging fluoride ligands. In the case of rhodium pentafluoride, these distances average 1.999(4) and 1.808(8) Å.[2] The Rh-F-Rh angles average 135°, which leads to a ruffled structure. In contrast, the M-F-M centers are linear in the pentafluorides of niobium, tantalum, molybdenum, and tungsten.
{{cite journal}}: CS1 maint: multiple names: authors list (link){{cite journal}}: CS1 maint: multiple names: authors list (link)