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Names | |||
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IUPAC names
Tetrafluoromethane
Carbon tetrafluoride |
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Other names
Carbon tetrafluoride, Perfluoromethane, Tetrafluorocarbon, Freon 14, Halon 14, Arcton 0, CFC 14, PFC 14, R 14, UN 1982
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Identifiers | |||
3D model (Jmol)
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ChEBI | |||
ChemSpider | |||
ECHA InfoCard | 100.000.815 | ||
EC Number | 200-896-5 | ||
PubChem CID
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RTECS number | FG4920000 | ||
UNII | |||
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Properties | |||
CF4 | |||
Molar mass | 88.0043 g/mol | ||
Appearance | Colorless gas | ||
Odor | odorless | ||
Density | 3.72 g/l, gas (15 °C) | ||
Melting point | −183.6 °C (−298.5 °F; 89.5 K) | ||
Boiling point | −127.8 °C (−198.0 °F; 145.3 K) | ||
0.005%V at 20 °C 0.0038%V at 25 °C |
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Solubility | soluble in benzene, chloroform | ||
Vapor pressure | 3.65 MPa at 15 °C 106.5 kPa at −127 °C |
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Henry's law
constant (kH) |
5.15 atm-cu m/mole | ||
Refractive index (nD)
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1.0004823 | ||
Structure | |||
Tetragonal | |||
Tetrahedral | |||
0 D | |||
Hazards | |||
Safety data sheet | ICSC 0575 | ||
NFPA 704 | |||
Flash point | Non-flammable | ||
1,100 °C (2,010 °F; 1,370 K) | |||
Related compounds | |||
Other cations
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Silicon tetrafluoride Germanium tetrafluoride Tin tetrafluoride Lead tetrafluoride |
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Related fluoromethanes
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Fluoromethane Difluoromethane Fluoroform |
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Related compounds
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Tetrachloromethane Tetrabromomethane Tetraiodomethane |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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what is ?) | (|||
Infobox references | |||
Tetrafluoromethane, also known as carbon tetrafluoride, is the simplest fluorocarbon (CF4). It has a very high bond strength due to the nature of the carbon–fluorine bond. It can also be classified as a haloalkane or halomethane. Because of the multiple carbon–fluorine bonds, and the high electronegativity of fluorine, the carbon in tetrafluoromethane has a significant positive partial charge which strengthens and shortens the four carbon–fluorine bonds by providing additional ionic character. Tetrafluoromethane is a potent greenhouse gas.
Carbon–fluorine bonds are the strongest single bonds in organic chemistry. Additionally, they strengthen as more carbon–fluorine bonds are added to the same carbon. In the one carbon organofluorine compounds represented by molecules of fluoromethane, difluoromethane, trifluoromethane, and tetrafluoromethane, the carbon–fluorine bonds are strongest in tetrafluoromethane. This effect is due to the increased coulombic attractions between the fluorine atoms and the carbon because the carbon has a positive partial charge of 0.76.
Tetrafluoromethane is the product when any carbon compound, including carbon itself, is burned in an atmosphere of fluorine. With hydrocarbons, hydrogen fluoride is a coproduct. It was first reported in 1926. It can also be prepared by the fluorination of carbon dioxide, carbon monoxide or phosgene with sulfur tetrafluoride. Commercially it is manufactured by the reaction of hydrogen fluoride with dichlorodifluoromethane or chlorotrifluoromethane; it is also produced during the electrolysis of metal fluorides MF, MF2 using a carbon electrode.