Manganese trioxide fluoride 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 green diamagnetic liquid, the compound has no applications, but it is of some academic interest as a rare example of a metal trioxide fluoride. The compound was detected in the 1880s but was only purified and crystallized much more recently. It can be prepared by

fluorosulfuric acid Fluorosulfuric acid (IUPAC name: sulfurofluoridic acid) is the inorganic compound with the chemical formula . It is one of the strongest acids commercially available. It is a tetrahedral molecule and is closely related to sulfuric acid, , substitu ...

and

potassium permanganate Potassium permanganate is an inorganic compound with the chemical formula KMnO4. It is a purplish-black crystalline salt, which dissolves in water as K+ and ions to give an intensely pink to purple solution. Potassium permanganate is widely us ...

: : crystallizes as a monomer, as confirmed by

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 molecules are tetrahedral with Mn-O and Mn-F distances of 1.59 and 1.72 Å, respectively. In contrast with , and have more complex structures as solids. The Re compound crystallizes as chains or rings consisting of fluoride-bridge octahedra. crystallizes as dimers with fluoride bridges. The rhenium compound also forms stable adducts with

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, whereas the is unstable in the presence of Lewis bases.

References

{{Manganese compounds Manganese compounds Fluorides Transition metal oxides