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| MolarMass = 169.9136 g mol<sup>-1</sup> | MolarMass = 169.9136 g mol<sup>-1</sup>
| Appearance = colorless gas | Appearance = colorless gas
| Density = 2.138 g cm<sup>-3</sup><ref name="BGIA GESTIS">{{GESTIS|ZVG= |CAS=7784-36-3 |Name=Arsenic(V) fluoride |Date=24/12/2007 }}</ref> | Density = 2.138 g cm<sup>-3</sup><ref name="GESTIS">{{GESTIS|ZVG=500011|CAS=7784-36-3|Name=Arsenic(V) fluoride |Date=24/12/2007}}</ref>
| MeltingPt = -79.8 ˚C<ref name="BGIA GESTIS"/> | MeltingPt = -79.8 ˚C<ref name="GESTIS"/>
| BoilingPt = -52.8 ˚C<ref name="BGIA GESTIS"/> | BoilingPt = -52.8 ˚C<ref name="GESTIS"/>
| Solubility = | Solubility =
| Solvent = ] | Solvent = ]

Revision as of 21:10, 25 August 2011

Arsenic pentafluoride
Structural formula
Structural formula
Ball-and-stick model
Ball-and-stick model
Names
IUPAC name Arsenic pentafluoride
Other names Arsenic(V) fluoride,
Arsorane, pentafluoro-
Identifiers
CAS Number
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.146 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/AsF5/c2-1(3,4,5)6Key: YBGKQGSCGDNZIB-UHFFFAOYSA-N
  • InChI=1/AsF5/c2-1(3,4,5)6Key: YBGKQGSCGDNZIB-UHFFFAOYAA
SMILES
  • F(F)(F)(F)F
Properties
Chemical formula AsF5
Molar mass 169.9136 g mol
Appearance colorless gas
Density 2.138 g cm
Melting point -79.8 ˚C
Boiling point -52.8 ˚C
Solubility in benzene soluble
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
4 0 1
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). checkY verify (what is  ?) Infobox references
Chemical compound

Arsenic pentafluoride is a chemical compound of arsenic and fluorine. The oxidation state of arsenic is +5.

Synthesis

Arsenic pentafluoride can be prepared by direct combination of arsenic and fluorine:

2As + 5F2 → 2AsF5

It can also be prepared by the reaction of arsenic trifluoride and fluorine:

AsF3 + F2 → AsF5

Properties

Arsenic pentafluoride is a colourless gas and has a trigonal bipyramidal structure. In the solid state the axial As-F bond lengths are 171.9 pm and the equatorial 166.8 pm.

Reactions

Arsenic pentafluoride forms halide complexes and is a powerful acceptor as shown by the reaction with sulfur tetrafluoride forming an ionic complex.

AsF5 + SF4 → SF3 + AsF6

See also

References

  1. ^ Record of Arsenic(V) fluoride in the GESTIS Substance Database of the Institute for Occupational Safety and Health, accessed on 24/12/2007.
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  3. An investigation of the structures of the adducts of SF4 with BF3, PF5, AsF5, and SbF5 in the solid state and in solution in HF, M. Azeem, M. Brownstein, and R. J. Gillespie Can. J. Chem. 47(22): 4159–4167 (1969), doi:10.1139/v69-689
Arsenic compounds
Arsenides
As(III)
As(III,V)
As(V)
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