Gold(III) fluoride

For other uses, see Gold fluoride.

Gold(III) fluoride is an inorganic compound of gold and fluorine with the molecular formula AuF₃. It is an orange solid that sublimes at 300 °C.^[4] It is a powerful fluorinating agent. It is very sensitive to moisture, yielding gold(III) hydroxide and hydrofluoric acid.

Gold(III) fluoride^[1]

Names
IUPAC name Gold(III) fluoride
Other names Gold trifluoride Auric fluoride
Identifiers
CAS Number	14720-21-9 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:30077 Y
ChemSpider	10790539 Y
PubChem CID	5460532
CompTox Dashboard (EPA)	DTXSID10933057
InChI InChI=1S/Au.3FH/h;3*1H/q+3;;;/p-3 Y Key: NIXONLGLPJQPCW-UHFFFAOYSA-K Y 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	253.961779 g·mol−1
Appearance	orange-yellow hexagonal crystals
Density	6.75 g/cm3
Melting point	sublimes above 300 °C
Solubility in water	Reacts[2][3]
Magnetic susceptibility (χ)	+74·10−6 cm3/mol
Structure
Crystal structure	Hexagonal, hP24
Space group	P6122, No. 178
Thermochemistry
Std enthalpy of formation (ΔfH⦵298)	−363.3 kJ/mol
Related compounds
Other anions	Gold(III) chloride Gold(III) bromide
Other cations	Silver fluoride Copper(II) fluoride Mercury(II) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Preparation

AuF₃ can be prepared by reacting AuCl₃ with F₂ or BrF₃.^[3]

Structure

The crystal structure of AuF₃ consists of spirals of square-planar AuF₄ units.^[5]

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