Selenium hexafluoride
- Formula: SeF6
- Hill system formula: F6Se1
- CAS registry number: [7783-79-1]
- Formula weight: 192.95
- Class: fluoride
- Colour: colourless
- Appearance: gas
- Melting point: -35°C ((2 atm. pressure))
- Boiling point: -47°C
- Density: 8.467 kg m-3 (gas)
The following are some synonyms of selenium hexafluoride:
- selenium hexafluoride
- selenium(VI) fluoride
- selenium fluoride
The oxidation number of selenium in selenium hexafluoride is 6.
Synthesis
Se +3F2 → SeF6
Selenium(VI) fluoride may be made in the laboratory by passing a stream of fluorine gas over solid selenium contained in a copper tube. Lower fluorides can be frozen out in a moderate cold trap while the hexafluoride is trapped in a liquid nitrogen cold trap. Selenium(VI) fluoride's melting point is -46.6°C.
Solid state structure
- Geometry of selenium:
- Prototypical structure:
Element analysis
The table shows element percentages for SeF6 (selenium hexafluoride).
| Element | % |
|---|---|
| F | 59.08 |
| Se | 40.92 |
Isotope pattern for SeF6
The chart below shows the calculated isotope pattern for the formula SeF6 with the most intense ion set to 100%.
References
The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.
- R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
- N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
- F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
- A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
- R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
- A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
- A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
- J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
- D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
- J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
- J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.