| 词条 | Osmium hexafluoride |
| 释义 |
| ImageFile =Osmium(VI)-fluoride.svg | ImageSize = | ImageAlt = | ImageFile1 = Osmium(VI)-fluorid.png | ImageSize1 = 240px | ImageAlt1 = Unit cell of osmium hexafluoride under standard conditions. | ImageCaption1 = Unit cell of osmium hexafluoride. | IUPACName = osmium(VI) fluoride | OtherNames = osmium hexafluoride |Section1={{Chembox Identifiers | CASNo = 13768-38-2 | PubChem = 123327 | SMILES = F[Os](F)(F)(F)(F)F | ChemSpiderID = 109930 | InChI = 1/6FH.Os/h6*1H;/q;;;;;;+6/p-6/rF6Os/c1-7(2,3,4,5)6 | InChIKey = MLKFZZUUYQWFMO-ZXTFGAQLAX | StdInChI = 1S/6FH.Os/h6*1H;/q;;;;;;+6/p-6 | StdInChIKey = MLKFZZUUYQWFMO-UHFFFAOYSA-H }} |Section2={{Chembox Properties | Formula = OsF6 | MolarMass = 304.22 g/mol | Appearance = yellow crystalline solid[1] | Density = 5.09g/mL[2] | MeltingPtC = 33.4 | MeltingPt_ref = [1] | BoilingPtC = 47.5 | BoilingPt_ref = [1] | Solubility = }} |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = |Section4={{Chembox Structure | LattConst_ref = [1] | LattConst_a = 938.7 pm | LattConst_b = 854.3 pm | LattConst_c = 494.4 pm | SpaceGroup = Pnma, No. 62 }} }} Osmium hexafluoride, also osmium(VI) fluoride, (OsF6) is a compound of osmium and fluorine, and one of the seventeen known binary hexafluorides. SynthesisOsmium hexafluoride is made by a direct reaction of osmium metal in an excess of elemental fluorine gas at 300 °C. {{chem|Os}} + 3 {{chem|F|2}} → {{chem|Os|F|6}} DescriptionOsmium hexafluoride is a yellow crystalline solid that melts at 33.4 °C and boils at 47.5 °C.[1] The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.387 Å, b = 8.543 Å, and c = 4.944 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 5.09 g·cm−3.[2] The OsF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Os–F bond length is 1.827 Å.[2] Partial hydrolysis of OsF6 produces OsOF4.[2] ReferencesFurther reading
External links
4 : Osmium compounds|Hexafluorides|Metal halides|Octahedral compounds |
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