Rhenium dioxide trfluoride is an

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

with the formula . A white diamagnetic solid, it one of the few oxyfluorides of rhenium, another being

rhenium trioxide fluoride Rhenium trioxide fluoride is an inorganic compound with the formula . It is a white, sublimable, diamagnetic solid, although impure samples appear colored. It one of the few oxyfluorides of rhenium, the other major one being rhenium dioxide trifl ...

, . The material is of some academic interest as a rare example of an dioxide trifluoride. It can be prepared by the reaction of

xenon difluoride Xenon is a chemical element; it has symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas found in Earth's atmosphere in trace amounts. Although generally unreactive, it can undergo a few chemical reactions such as th ...

and rhenium trioxide chloride: : According to

X-ray crystallography X-ray crystallography is the experimental science of determining the atomic and molecular structure of a crystal, in which the crystalline structure causes a beam of incident X-rays to Diffraction, diffract in specific directions. By measuring th ...

, the compound can exist in four polymorphs. Two polymorphs adopt chain-like structures featuring octahedral Re centers linked by ridging bridging fluorides. Two other polymorphs adopt cyclic structures and , again featuring octahedral Re centers and bridging fluorides. Like related oxyfluorides, these coordination oligomers break up in the presence of

Lewis base A Lewis acid (named for the American physical chemist Gilbert N. Lewis) is a chemical species that contains an empty orbital which is capable of accepting an electron pair from a Lewis base to form a Lewis adduct. A Lewis base, then, is any sp ...

s. Adducts of the formula where L =

acetonitrile Acetonitrile, often abbreviated MeCN (methyl cyanide), is the chemical compound with the formula and structure . This colourless liquid is the simplest organic nitrile (hydrogen cyanide is a simpler nitrile, but the cyanide anion is not class ...

have been crystallized.

References

{{Reflist Rhenium compounds Fluorides Transition metal oxides