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Henri Moissan's 1892 record of fluorine gas color, viewed end-on in a 5‑m tube. Air (1) is on the left, fluorine (2) is in the middle, chlorine (3) is on the right. Fluorine forms diatomic molecules (F 2) that are gaseous at room temperature with a density about 1.3 times that of air.
At room temperature, fluorine is a gas of diatomic molecules, [5] pale yellow when pure (sometimes described as yellow-green). [42] It has a characteristic halogen-like pungent and biting odor detectable at 20 ppb. [43]
Manganese tetrafluoride is an unstable solid that decomposes even at room temperature. [62] Only one of the two allotropes, α-MnF 4 , is understood. In this compound, manganese forms –MnF 6 – octahedra which share bridging fluorines to make –Mn 4 F 20 – rings which are then further connected three dimensionally.
Among alkaline-earth fluorides, barium-tin fluoride (BaSnF 4) has been investigated because of its relatively high ionic conductivity at room temperature, on the order of 10 −4 S cm −1. Despite the increased ionic conductivity, the low electrochemical stability window of Sn 2+ prevents the use of reducing metals as anodes, decreasing the ...
Oxygen difluoride. A common preparative method involves fluorination of sodium hydroxide: . 2 F 2 + 2 NaOH → OF 2 + 2 NaF + H 2 O. OF 2 is a colorless gas at room temperature and a yellow liquid below 128 K. Oxygen difluoride has an irritating odor and is poisonous. [3]
Cyanogen fluoride (molecular formula: FCN; IUPAC name: carbononitridic fluoride) is an inorganic linear compound which consists of a fluorine atom in a single bond with a carbon atom, and a nitrogen atom in a triple bond with the carbon atom. It is a toxic and explosive gas at room temperature.
Manganese tetrafluoride is in equilibrium with manganese(III) fluoride and elemental fluorine: . MnF 4 ⇌ MnF 3 + 1 / 2 F 2. Decomposition is favoured by increasing temperature, and disfavoured by the presence of fluorine gas, but the exact parameters of the equilibrium are unclear, with some sources saying that MnF 4 will decompose slowly at room temperature, [14] [15] others placing ...
Among the hexatomic interhalogens, IF 5 has a higher boiling point (97 °C) than BrF 5 (40.5 °C), although both compounds are liquids at room temperature. The interhalogen IF 7 can be formed by reacting palladium iodide with fluorine. [1]