Gold(III) fluoride

Gold(III) fluoride, AuF3, 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.

For other uses, see Gold fluoride.
Gold(III) fluoride[1]
Names
IUPAC name
Gold(III) fluoride
Other names
Gold trifluoride
Auric fluoride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
  • InChI=1S/Au.3FH/h;3*1H/q+3;;;/p-3 checkY
    Key: NIXONLGLPJQPCW-UHFFFAOYSA-K checkY
  • InChI=1/Au.3FH/h;3*1H/q+3;;;/p-3
    Key: NIXONLGLPJQPCW-DFZHHIFOAD
  • [Au+3].[F-].[F-].[F-]
Properties
AuF3
Molar mass 253.961779 g·mol−1
Appearance orange-yellow hexagonal crystals
Density 6.75 g/cm3
Melting point sublimes above 300°C
Reacts[2][3]
+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).
☒N verify (what is checkY☒N ?)
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 cellneighbouring (AuF3)n helicesdistorted octahedral coordination of gold by six fluorinestop-down view of an (AuF3)n helixside 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. Victor Lenher (1903). "Fluoride of Gold.1". Journal of the American Chemical Society. 25 (11): 1136–1138. doi:10.1021/ja02013a004.
  3. Inis C. Tornieporth-Oetting; Thomas M. Klapötke (1995). "Laboratory Scale Direct Synthesis of Pure AuF3". Chemische Berichte. 128 (9): 957–958. doi:10.1002/cber.19951280918.
  4. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8., p. 1184.
  5. 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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