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Mercury(II) fluoride

Names
IUPAC name Mercury(II) fluoride
Other names Mercuric fluoride
Identifiers
CAS Number	7783-39-3
3D model (JSmol)	Interactive image
ECHA InfoCard	100.029.085
EC Number	231-994-6
PubChem CID	82209
UNII	1EGI9VXN9A
CompTox Dashboard (EPA)	DTXSID601337587 DTXSID6064820, DTXSID601337587
InChI InChI=1S/2FH.Hg/h2*1H;/q;;+2/p-2Key: FMSYTQMJOCCCQS-UHFFFAOYSA-L
SMILES FF
Properties
Chemical formula	HgF2
Molar mass	238.587 g/mol
Appearance	hygroscopic white cubic crystals
Density	8.95 g/cm
Melting point	decomposes at 645°C
Solubility in water	reacts
Magnetic susceptibility (χ)	−62.0·10 cm/mol
Structure
Crystal structure	Fluorite (cubic), cF12
Space group	Fm3m, No. 225
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	highly toxic
GHS labelling:
Pictograms
Hazard statements	H300, H310, H330, H373, H410
Precautionary statements	P301+P310, P304+P340, P320, P330, P360, P361, P405, P501
NFPA 704 (fire diamond)	4 0 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 , 100 kPa). N verify (what is  ?) Infobox references

Mercury(II) fluoride has the molecular formula HgF₂ as a chemical compound of one atom of mercury with 2 atoms of fluorine.

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 HgO + 2 F₂ → 2 HgF₂ + O₂

with oxygen as byproduct.

Applications

Mercury(II) fluoride is a selective fluorination agent.

References

1. Lide, David R (1998), Handbook of Chemistry and Physics (87th ed.), Boca Raton, Florida: CRC Press, pp. 4–69, ISBN 0-8493-0594-2
2. "Mercury(II) fluoride MSDS". ThermoFisher Scientific. Retrieved 2022-02-02.
3. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
4. 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.

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