Mercury(II) fluoride
Mercury(II) fluoride has the molecular formula HgF2 as a chemical compound of one atom of mercury with 2 atoms of fluorine.
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| Names | |
|---|---|
| IUPAC name
Mercury(II) fluoride | |
| Other names
Mercuric fluoride | |
| Identifiers | |
CAS Number |
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| ECHA InfoCard | 100.029.085 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
Chemical formula |
HgF2 |
| Molar mass | 238.587 g/mol |
| Appearance | hygroscopic white cubic crystals |
| Density | 8.95 g/cm3 |
| Melting point | decomposes at 645°C |
Solubility in water |
reacts[1] |
Magnetic susceptibility (χ) |
−62.0·10−6 cm3/mol |
| Structure | |
Crystal structure |
Fluorite (cubic), cF12 |
Space group |
Fm3m, No. 225 |
| Hazards | |
| Main hazards | highly toxic |
| GHS pictograms |    |
| NFPA 704 (fire diamond) | 
0
4
0 |
| Related compounds | |
Other anions |
Mercury(II) chloride Mercury(II) bromide Mercury(II) iodide |
Other cations |
Mercury(I) fluoride Zinc fluoride Cadmium fluoride Thallium(I) fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
Synthesis
Mercury(II) fluoride is most commonly produced by the reaction of mercury(II) oxide and hydrogen fluoride:
- HgO + 2 HF → HgF2 + H2O
Mercury(II) fluoride can also be produced through the fluorination of mercury(II) chloride:
- HgCl2 + F2 → HgF2 + Cl2
or of mercury(II) oxide:[2]
- 2 HgO + 2 F2 → 2 HgF2 + O2
with oxygen as byproduct.
Applications
Mercury(II) fluoride is a selective fluorination agent.[3]
References
- Lide, David R (1998), Handbook of Chemistry and Physics (87th ed.), Boca Raton, Florida: CRC Press, pp. 4–69, ISBN 0-8493-0594-2
- Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- Habibi, Mohammed H.; Mallouk, Thomas E. (1991). "Photochemical selective fluorination of organic molecules using mercury (II) fluoride". Journal of Fluorine Chemistry. 51 (2): 291. doi:10.1016/S0022-1139(00)80299-7.