Gold(III) fluoride

Gold(III) fluoride[1]
IUPAC name

gold(III) fluoride
Other names

gold trifluoride
Identifiers
CAS number 14720-21-9
ChemSpider 10790539 Y
ChEBI CHEBI:30077 Y
Jmol-3D images Image 1
Properties
Molecular formula AuF3
Molar mass 253.962 g/mol
Appearance orange-yellow hexagonal crystals
Density 6.75 g/cm3
Melting point

sublimes above 300°C
Structure
Crystal structure Hexagonal, hP24
Space group P6122, No. 178
Thermochemistry
Std enthalpy of
formation ΔfHo298		 -363.3 kJ/mol
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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.). Oxford: Butterworth-Heinemann. ISBN 0080379419. , 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.