| 词条 | Sodium tetrafluoroborate |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 451980637 | ImageFileL1 = Sodium-3D.png | ImageNameL1 = The sodium cation | ImageFileR1 = Tetrafluoroborate-ion-3D-balls.png | ImageNameR1 = The tetrafluoroborate anion (ball-and-stick model) | OtherNames = sodium fluoroborate, NaBF4 | Section1 = {{Chembox Identifiers | CASNo_Ref = {{cascite|correct|CAS}} | CASNo = 13755-29-8 | PubChem = 4343483 | ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | ChemSpiderID = 24462 | InChI = 1S/BF4.Na/c2-1(3,4)5;/q-1;+1 | SMILES = [B-](F)(F)(F)F.[Na+] | Section2 = {{Chembox Properties | Formula = NaBF4 | MolarMass = 109.794 g/mol | MeltingPtC = 384 | BoilingPt = | Density = 2.47 g/cm3 | Section3 = {{Chembox Hazards | RPhrases = | SPhrases = | ExternalMSDS = | Section8 = {{Chembox Related | OtherCations = Nitrosonium tetrafluoroborate }}Sodium tetrafluoroborate is an inorganic compound with formula NaBF4. It is a salt that forms colorless or white water-soluble rhombic crystals and is soluble in water (108 g/100 mL) but less soluble in organic solvents.[1] Sodium tetrafluoroborate is used in some fluxes used for brazing and to produce Boron trifluoride.[2] PreparationSodium tetrafluoroborate can be prepared by neutralizing tetrafluoroboric acid with sodium carbonate or sodium hydroxide.[3] NaOH + HBF4 → NaBF4 + H2O Na2CO3 + 2 HBF4 → 2 NaBF4 + H2O + CO2 Alternatively the chemical can be synthesized from boric acid, hydrofluoric acid, and sodium carbonate:[2] 2H3BO3 + 8HF + Na2CO3 → 2NaBF4 + 7H2O + CO2 Reactions and usesOn heating to its melting point, sodium tetrafluoroborate decomposes to sodium fluoride and boron trifluoride:[4] NaBF4 → NaF + BF3 It is a source of tetrafluoroborate anion, which is used in organic chemistry for the preparation of salts. Sodium tetrafluoroborate can be used for synthesis of ionic liquids, where tetrafluoroborate is the anion. References1. ^{{Cite journal | url = https://books.google.com/books?id=oWdc2qcb3QsC&pg=PA564&dq=Sodium+tetrafluoroborate&cd=5#v=onepage&q=Sodium%20tetrafluoroborate&f=false | title = Gardner's Commercially Important Chemicals: Synonyms, Trade Names, and Properties | isbn = 9780471735182 | author1 = Milne | first1 = G. W. A | date = 2005-07-11}} {{sodium compounds}}{{fluorine compounds}}2. ^1 {{cite book|last=Brauer|first=Georg|title=Handbook of Preparative Inorganic Chemistry Vol. 1, 2nd Ed.|date=1963|publisher=Academic Press|location=Newyork|isbn=978-0121266011|page=220 & 222|url=https://books.google.com/books?id=TLYatwAACAAJ&dq=Handbook+of+Preparative+Inorganic+Chemistry&hl=en&sa=X&ei=IPT2UtTZGMfgoASR1IGgDg&ved=0CC8Q6AEwAQ}} 3. ^{{Cite journal | url = https://books.google.com/books?id=Owuv-c9L_IMC&pg=PA1001&dq=Sodium+tetrafluoroborate&cd=19#v=onepage&q=Sodium%20tetrafluoroborate&f=false | title = Concise Encyclopedia Chemistry | isbn = 9783110114515 | author1 = Eagleson | first1 = Mary | year = 1994}} 4. ^{{Cite journal | url = https://books.google.com/books?id=LkIWiNg4FGEC&pg=PA1271&dq=%22Sodium+tetrafluoroborate%22 | title = Hazardous Chemicals Desk Reference | isbn = 9780470334454 | author1 = Richard j. Lewis | first1 = Sr | date = 2008-07-14}} 3 : Tetrafluoroborates|Sodium compounds|Brazing and soldering |
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