Mercury(II) fluoride

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-2 Key: FMSYTQMJOCCCQS-UHFFFAOYSA-L;
	SMILES F[Hg]F;
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
Magnetic susceptibility (χ)	−62.0·10−6 cm3/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 [77 °F], 100 kPa). 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

2 HgO 2 F₂ → 2 HgF₂ O₂

with oxygen as byproduct.

Mercury(II) fluoride is a selective fluorination agent.^[4]

^ Lide, David R (1998), Handbook of Chemistry and Physics (87th ed.), Boca Raton, Florida: CRC Press, pp. 4–69, ISBN 0-8493-0863-2
^ "Mercury(II) fluoride MSDS". ThermoFisher Scientific. Retrieved 2022-02-02.
^ 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.

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