Manganese trioxide fluoride
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| Identifiers | |
|---|---|
| Properties | |
| FMnO3 | |
| Molar mass | 121.933 g·mol−1 |
| Appearance | green liquid |
| Density | 6.042 g/cm3 |
| Melting point | −45 °C (−49 °F; 228 K) |
| Boiling point | decomposition above its melting point |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Manganese trioxide fluoride is an inorganic compound with the formula MnO3F. A green diamagnetic liquid, the compound has no applications, but it is of some academic interest as a rare example of a trioxide fluoride.
The compound was detected in the 1880's but was only purified and crystallized much more recently.[1] It can be prepared by fluorosulfuric acid and potassium permanganate:
- KMnO4 + 2HF → MnO3F + KF + H2O
MnO3F crystallizes as a monomer, as confirmed by X-ray crystallography. The molecules are tetrahedral with Mn-O and Mn-F distances of 1.59 and 1.72 Å, respectively.
In contrast with MnO3F, ReO3F crystallizes as chains or rings consisting of fluoride-bridge octahedra. The rhenium compound also forms stable adducts with Lewis bases.[2]
References
- ^ Schmidbaur, Hubert; Schwarz, W. H. Eugen (2021). "Permanganyl Fluoride: A Brief History of the Molecule MnO3F and of Those Who Cared for It". Chemistry – A European Journal. 27 (23): 6848–6859. doi:10.1002/chem.202004759. PMC 8247864. PMID 33219726.
- ^ Supeł, Joanna; Marx, Rupert; Seppelt, Konrad (2005). "Preparation and Structure of Rhenium Fluoride Trioxide ReO3F, and the Polymorphism of Rhenium Trifluoride Dioxide, ReO2F3". Zeitschrift für anorganische und allgemeine Chemie. 631 (15): 2979–2986. doi:10.1002/zaac.200500239.