| 词条 | Octafluorocyclobutane |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 436868615 | ImageFileL1 = Perfluorocyclobutane.svg | ImageSizeL1 = 110 | ImageAltL1 = Structural formula of octafluorocyclobutane | ImageFileR1 = Perfluorocyclobutane 3D.png | ImageSizeR1 = 125 | ImageAltR1 = Ball-and-stick of the octafluorocyclobutane molecule | IUPACName = Octafluorocyclobutane | OtherNames = Freon-C-318, perfluorocyclobutane |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|CAS}} | CASNo = 115-25-3 | EINECS = 204-075-2 | PubChem = | ChEBI_Ref = {{ebicite|changed|EBI}} | ChEBI = 31007 | ChEMBL_Ref = {{ebicite|changed|EBI}} | ChEMBL = 444147 | ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | ChemSpiderID = 13846040 | SMILES = C1(C(C(C1(F)F)(F)F)(F)F)(F)F | InChI = 1/C4F8/c5-1(6)2(7,8)4(11,12)3(1,9)10 | InChIKey = BCCOBQSFUDVTJQ-UHFFFAOYAW | StdInChI_Ref = {{stdinchicite|changed|chemspider}} | StdInChI = 1S/C4F8/c5-1(6)2(7,8)4(11,12)3(1,9)10 | StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} | StdInChIKey = BCCOBQSFUDVTJQ-UHFFFAOYSA-N |Section2={{Chembox Properties | Formula = C4F8 | MolarMass = 200.03 g/mol | Appearance = colourless gas | Density = 1.637 g/cm3 at −5.8 °C (liquid) 9.97 kg/m3 at −6 °C and 1 atm (gas) 8.82 kg/m3 15 °C and 1 atm (gas) | MeltingPtC = −40.1 | BoilingPtC = −5.8 | Solubility = 0.016 vol/vol (1.013 bar and 20 °C) | Viscosity = 109e-6 Poise (1.013 bar and 0 °C) |Section7={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }}Octafluorocyclobutane, or perfluorocyclobutane, C4F8, is an organofluorine compound which enjoys several niche applications. It is related to cyclobutane by replacement of all C–H bonds with C–F bonds. Octafluorocyclobutane is produced by the dimerization of tetrafluoroethylene and the reductive coupling of 1,2-dichloro-1,1,2,2-tetrafluoroethane.[1] ApplicationsIn the production of semiconductor materials and devices, octafluorocyclobutane serves as a deposition gas and etchant.[2] It has also been investigated as a refrigerant in specialised applications, as a replacement for ozone depleting chlorofluorocarbon refrigerants. Exploiting its volatility and chemical inertness, octafluorocyclobutane may be found in some aerosolized foods. It is listed by the Codex Alimentarius under number 946 (E946 for EU). It is investigated as a possible replacement for sulfur hexafluoride as a dielectric gas. References1. ^{{ Ullmann |author1=Siegemund, G.|author2=Schwertfeger, W.|author3=Feiring, A.|author4=Smart, B.|author5=Behr, F.|author6=Vogel, H.|author7=McKusick, B. | title = Fluorine Compounds, Organic | doi = 10.1002/14356007.a11_349 }} 2. ^{{cite web | url = http://encyclopedia.airliquide.com/Encyclopedia.asp?GasID=50#GeneralData | work = Gas Encyclopaedia | publisher = Air Liquide | title = Octafluorocyclobutane (RC318) | accessdate = May 15, 2013}} AppendixIts critical point is at 115.3 °C and 2.79 MPa. 5 : Perfluorinated compounds|Aerosol propellants|Refrigerants|Dielectric gases|Cyclobutanes |
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