Mercury(II) fluoride

Mercury(II) fluoride

Names
IUPAC name Mercury(II) fluoride
Other names Mercuric fluoride
Identifiers
CAS Number	7783-39-3=
ECHA InfoCard	100.029.085
PubChem	82209
Properties
Chemical formula	HgF2
Molar mass	238.587 g/mol
Appearance	hygroscopic white cubic crystals
Density	8.95 g/cm^3
Melting point	decomposes at 645°C
Solubility in water	reacts[1]
Structure
Crystal structure	Fluorite (cubic), cF12
Space group	Fm3m, No. 225
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

"Mercuric fluoride" redirects here.

Mercury(II) fluoride has the molecular formula HgF₂.

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 mercury(II) oxide:.^[2]

2 HgO + 2 F₂ → 2 HgF₂ + O₂

Applications

Mercury(II) fluoride is a selective fluorination agent.^[3]

References

1. Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–69, ISBN 0-8493-0594-2
2. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.
3. 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.