Rhodium pentafluoride is an

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...

with the formula Rh₄F₂₀. It is a red solid. It is prepared by fluorination of rhodium trifluoride at 400 °C. According to X-ray crystallography, the Rh centers are octahedral. The structure is very similar to that of the related

ruthenium pentafluoride Ruthenium pentafluoride is the inorganic compound with the empirical formula RuF5. This green volatile solid has rarely been studied but is of interest as a binary fluoride of ruthenium, i.e. a compound containing only Ru and F. It is sensitive t ...

osmium pentafluoride Osmium pentafluoride is an inorganic compound with the formula OsF5. It is a blue-green solid. Like the pentafluorides of Ru, Rh, and Ir, OsF5 exists as a tetramer in the solid state. Preparation Osmium pentafluoride can be prepared by redu ...

, and

iridium pentafluoride Iridium(V) fluoride, IrF5, is a chemical compound of iridium and fluorine. A highly reactive yellow low melting solid, it has a tetrameric structure, Ir4F20, which contains octahedrally coordinated iridium atoms.Egon Wiberg, Arnold Frederick Holl ...

. All are tetrameric, meaning that they have the molecular structure F₅sub>4. The M-F distances for the bridging 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. 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.

References

{{Fluorides Rhodium compounds Fluorides Platinum group halides