Carbon tetrafluoride
- Formula: CF4
- Hill system formula: C1F4
- CAS registry number: [75-73-0]
- Formula weight: 88.004
- Class: fluoride
- Colour: colourless
- Appearance: gas
- Melting point: -183.6°C
- Boiling point: -128°C
- Density: 1.96 (-184°C)
The following are some synonyms of carbon tetrafluoride:
- carbon tetrafluoride
- carbon(IV) fluoride
- carbon fluoride
- tetrafluoromethane
The oxidation number of carbon in carbon tetrafluoride is 4.
Synthesis
C + 2F2 → CF4
Carbon tetrafluoride may be made by direct reaction between carbon and fluorine. Charcoals are not suitable as higher weight carbon fluoride form. The reaction can be carried out in a copper tube. Impurities in the gaseous product may be removed by fractional distillation. Carbon tetrafluoride melts at -183.6°C and boils at -127.8°C.
Solid state structure
- Geometry of carbon: 4 coordinate: tetrahedral
- Prototypical structure:
Element analysis
The table shows element percentages for CF4 (carbon tetrafluoride).
| Element | % |
|---|---|
| C | 13.65 |
| F | 86.35 |
Isotope pattern for CF4
The chart below shows the calculated isotope pattern for the formula CF4 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.