Gold(III) fluoride

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

Gold(III) fluoride[1]
Names
IUPAC name
Gold(III) fluoride
Other names
Gold trifluoride
Auric fluoride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
Properties
AuF3
Molar mass 253.962 g/mol
Appearance orange-yellow hexagonal crystals
Density 6.75 g/cm3
Melting point sublimes above 300°C
Insoluble
+74·10−6 cm3/mol
Structure
Hexagonal, hP24
P6122, No. 178
Thermochemistry
-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).
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Infobox references
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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, Florida: 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 978-0-08-037941-8., p. 1184.
  3. F. W. B. Einstein; P. R. Rao; James Trotter; 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.


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