Gold(III) fluoride

Gold(III) fluoride^[1]

Names
IUPAC name Gold(III) fluoride
Other names Gold trifluoride Auric fluoride
Identifiers
CAS Number	14720-21-9
ChEBI	CHEBI:30077
ChemSpider	10790539
Jmol interactive 3D	Image
PubChem	5460532
InChI InChI=1S/Au.3FH/h;3*1H/q+3;;;/p-3 Key: NIXONLGLPJQPCW-UHFFFAOYSA-K InChI=1/Au.3FH/h;3*1H/q+3;;;/p-3 Key: NIXONLGLPJQPCW-DFZHHIFOAD
SMILES [Au+3].[F-].[F-].[F-]
Properties
Chemical formula	AuF3
Molar mass	253.962 g/mol
Appearance	orange-yellow hexagonal crystals
Density	6.75 g/cm^3
Melting point	sublimes above 300°C
Structure
Crystal structure	Hexagonal, hP24
Space group	P6122, No. 178
Thermochemistry
Std enthalpy of formation (ΔfH^o298)	-363.3 kJ/mol
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

Gold(III) fluoride, AuF₃, is an orange solid that sublimes at 300 °C.^[2] It is a powerful fluorinating agent.

Preparation

AuF₃ can be prepared by reacting AuCl₃ with F₂ or BrF₃.

Structure

The crystal structure of AuF₃ consists of spirals of square-planar AuF₄ units.^[3]

AuF3 unit cell	neighbouring (AuF3)n helices	distorted octahedral coordination of gold by six fluorines	top-down view of an (AuF3)n helix	side view of an (AuF3)n helix

References

1. Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–59. 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., p. 1184.
3. F. W. B. Einstein, P. R. Rao, James Trotter and Neil Bartlett (1967). "The crystal structure of gold trifluoride". Journal of the Chemical Society A: Inorganic, Physical, Theoretical 4: 478–482. doi:10.1039/J19670000478.