Niobium pentafluoride is obtained by treatment of any niobium compound with fluorine:[2]
2 Nb + 5 F2 → 2 NbF5
2 NbCl5 + 5 F2 → 2 NbF5 + 5 Cl2
As shown by X-ray crystallography, the solid consists of tetramers [NbF5]4. This structure is related to that for WOF4.[3]
Reactionsedit
It reacts with hydrogen fluoride to give H2NbF7, a superacid. In hydrofluoric acid, NbF5 converts to [NbF7]2- and [NbF5O]2-. The relative solubility of K2[MFO] (M = Nb, Ta) is the basis of the Marignac process for separation of Nb and Ta.
NbCl5 forms a dimeric structure (edge-shared bioctahedron) in contrast to the corner-shared tetrameric structure of the fluoride.
External linksedit
NIST Standard Reference Database
Referencesedit
^Joachim Eckert; Hermann C. Starck (2005). "Niobium and Niobium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a17_251. ISBN3527306730.
^Homer F. Priest (1950). "Anhydrous Metal Fluorides". Inorganic Syntheses. Vol. 3. p. 171. doi:10.1002/9780470132340.ch47.
^Edwards, A. J. (1964). "717. The structures of niobium and tantalum pentafluorides". Journal of the Chemical Society (Resumed): 3714. doi:10.1039/jr9640003714.
April 18, 2024
niobium, fluoride, also, known, niobium, pentafluoride, inorganic, compound, with, formula, nbf5, colorless, solid, namesiupac, names, niobium, pentafluorideidentifierscas, number, 7783, model, jsmol, interactive, imagechemspider, 74197echa, infocard, 109ec, n. Niobium V fluoride also known as niobium pentafluoride is the inorganic compound with the formula NbF5 It is a colorless solid 1 Niobium V fluoride NamesIUPAC names Niobium V fluorideNiobium pentafluorideIdentifiersCAS Number 7783 68 8 Y3D model JSmol Interactive imageChemSpider 74197ECHA InfoCard 100 029 109EC Number 232 020 2PubChem CID 82217UNII T86H76439H YCompTox Dashboard EPA DTXSID0064832InChI InChI 1S 5FH Nb h5 1H q 5 p 5Key AOLPZAHRYHXPLR UHFFFAOYSA ISMILES F Nb F F F FPropertiesChemical formula F 5NbMolar mass 187 89839 g mol 1Appearance colorless hygroscopic solidDensity 3 293 g cm3Melting point 72 to 73 C 162 to 163 F 345 to 346 K Boiling point 236 C 457 F 509 K Solubility in water reactsSolubility slightly soluble in chloroform carbon disulfide sulfuric acidHazardsGHS labelling PictogramsSignal word WarningHazard statements H302 H312 H314 H332Precautionary statements P260 P261 P264 P270 P271 P280 P301 P312 P301 P330 P331 P302 P352 P303 P361 P353 P304 P312 P304 P340 P305 P351 P338 P310 P312 P321 P322 P330 P363 P405 P501Flash point Non flammableRelated compoundsOther anions Niobium V chlorideNiobium V bromideNiobium V iodideOther cations Vanadium V fluorideTantalum V fluorideRelated niobium fluorides Niobium III fluorideNiobium IV fluorideExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Y verify what is Y N Infobox references Contents 1 Preparation and structure 2 Reactions 3 External links 4 ReferencesPreparation and structure editNiobium pentafluoride is obtained by treatment of any niobium compound with fluorine 2 2 Nb 5 F2 2 NbF5 2 NbCl5 5 F2 2 NbF5 5 Cl2As shown by X ray crystallography the solid consists of tetramers NbF5 4 This structure is related to that for WOF4 3 Reactions editIt reacts with hydrogen fluoride to give H2NbF7 a superacid In hydrofluoric acid NbF5 converts to NbF7 2 and NbF5O 2 The relative solubility of K2 MFO M Nb Ta is the basis of the Marignac process for separation of Nb and Ta NbCl5 forms a dimeric structure edge shared bioctahedron in contrast to the corner shared tetrameric structure of the fluoride External links editNIST Standard Reference DatabaseReferences edit Joachim Eckert Hermann C Starck 2005 Niobium and Niobium Compounds Ullmann s Encyclopedia of Industrial Chemistry Weinheim Wiley VCH doi 10 1002 14356007 a17 251 ISBN 3527306730 Homer F Priest 1950 Anhydrous Metal Fluorides Inorganic Syntheses Vol 3 p 171 doi 10 1002 9780470132340 ch47 Edwards A J 1964 717 The structures of niobium and tantalum pentafluorides Journal of the Chemical Society Resumed 3714 doi 10 1039 jr9640003714 Retrieved from https en wikipedia org w index php title Niobium V fluoride amp oldid 1197890873, wikipedia, wiki, book, books, library,
