Gold(III) fluoride

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Gold(III) fluoride[1]
AuF3structure.jpg
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
+74·10−6 cm3/mol
Structure
Hexagonal, hP24
P6122, No. 178
Thermochemistry
-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[edit]

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

Structure[edit]

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

Gold-trifluoride-unit-cell-3D-balls.png
Gold-trifluoride-3D-balls.png
Gold-trifluoride-coordination-3D-balls.png
Gold-trifluoride-spiral-top-faded-3D-balls.png
Gold-trifluoride-spiral-side-3D-balls.png
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[edit]

  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; 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.