Rhodium pentafluoride

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Rhodium pentafluoride
Names
IUPAC name
Rhodium(V) fluoride
Identifiers
3D model (
JSmol
)
  • InChI=1S/5FH.Rh/h5*1H;/q;;;;;+5/p-5
    Key: AUMCJABXDMCEGV-UHFFFAOYSA-I
  • F[Rh](F)(F)(F)F
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°
663.85
8
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Rhodium pentafluoride is an inorganic 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 related

iridium pentafluoride. All are tetrameric, meaning that they have the molecular structure [MF5]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.[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.

References

  1. doi:10.1039/c19650000306.{{cite journal}}: CS1 maint: multiple names: authors list (link
    )
  2. doi:10.1021/ic50129a029.{{cite journal}}: CS1 maint: multiple names: authors list (link
    )
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