Selenium hexafluoride is the chemical compound of formula SeF6. It is a colourless gas. It can be prepared from the elements or by the reaction of bromine trifluoride, BrF3 and selenium dioxide. It is similar to sulfur hexafluoride, as it is octahedral (Se-F bond length 168.8pm, and under normal conditions is inert to water.
Sulfur hexafluoride (SF6) is an inorganic, colorless, odorless, non-toxic and non-flammable gas (under standard conditions). SF6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom. It is a hypervalent molecule.
Tungsten(VI) fluoride, also known as tungsten hexafluoride, is the inorganic compound of tungsten and fluorine with the formula WF6. This corrosive, colorless compound is a gas at the ambient conditions, that is a pressure of 1 atm and room temperature (20-25 °C). With the density of about 13 g/L, it is one of the heaviest known gases at normal conditions;[1
Uranium hexafluoride (UF6), referred to as "hex" in the nuclear industry, is a compound used in the uranium enrichment process that produces fuel for nuclear reactors and nuclear weapons. It forms solid grey crystals at standard temperature and pressure (STP), is highly toxic, reacts violently with water and is corrosive to most metals.
Xenon hexafluoride is a noble gas compound with the formula XeF6 and the highest of the three binary fluorides of xenon, the other two being XeF2 and XeF4. All are exergonic and stable at normal temperatures. XeF6 is the strongest fluorinating agent of the series.