| 词条 | Rhenium hexafluoride |
| 释义 |
| ImageFile =Rhenium(VI)-fluoride.svg | ImageSize = | ImageAlt = | IUPACName = rhenium(VI) fluoride | OtherNames = rhenium hexafluoride |Section1={{Chembox Identifiers | CASNo = 10049-17-9 | UNII_Ref = {{fdacite|correct|FDA}} | UNII = U1FW6E300T | PubChem = 66231 | EINECS = 233-172-2 | InChI = 1S/6FH.Re/h6*1H;/q;;;;;;+6/p-6 | SMILES = F[Re](F)(F)(F)(F)F }} |Section2={{Chembox Properties | Re=1 | F=6 | MolarMass = 300.20 g/mol | Appearance = liquid, or yellow crystalline solid[1] | Density = 4.94g/mL[2] | MeltingPtC = 18.5 | MeltingPt_ref = [1] | BoilingPtC = 33.7 | BoilingPt_ref = [1] | Solubility = }} |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }} Rhenium hexafluoride, also rhenium(VI) fluoride, (ReF6) is a compound of rhenium and fluorine and one of the seventeen known binary hexafluorides. SynthesisRhenium hexafluoride is made by combining rhenium heptafluoride with additional rhenium metal at 300 °C in a pressure vessel.[2] 6 {{chem|Re|F|7}} + Re → 7 {{chem|Re|F|6}} DescriptionRhenium hexafluoride is a liquid at room temperature. At 18.5 °C, it freezes into a yellow solid. The boiling point is 33.7 °C.[1] The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.417 Å, b = 8.570 Å, and c = 4.965 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 4.94 g·cm−3.[2] The ReF6 molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (Oh). The Re–F bond length is 1.823 Å.[2] UseRhenium hexafluoride is a commercial material used in the electronics industry for depositing films of rhenium.[1] ReferencesFurther reading
External links
3 : Rhenium compounds|Hexafluorides|Octahedral compounds |
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