Oxygen compounds: oxygen difluoride
The oxygen in oxygen difluoride formally is in the oxidation state 2.
- Formula as often written: OF2
- Hill system formula: F2O1
- CAS registry number: [7783-41-7]
- Formula weight: 53.996
- Class: fluoride
- oxygen difluoride
- oxygen(II) fluoride
- difluorine monoxide
- fluorine oxide
- oxygen fluoride
- Colour: colourless
- Appearance: gas
- Melting point: -224°C
- Boiling point: -145°C
- Density: 2.26 kg dm-3 (gas)
Element percentages for the elements in oxygen difluoride
2NaOH + 2F2 → OF2 + 2NaF + H2O
The reaction between fluorine gas and a dilute solution of sodium hydroxide in water results in oxygen fluoride. The product gas also contains oxygen. When pure, oxygen fluoride has a melting point of -223.8°C and boils at -144.8°C. It is soluble to some extent in water.
Solid state structure
- Geometry of oxygen:
- Prototypical structure:
What follows is the calculated isotope pattern for the OF2 unit with the most intense ion set to 100%.
54 100.0 __________________________________________________
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.