| Revision as of 14:24, 10 December 2010 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (no changed fields - added verified revid - updated 'UNII_Ref', 'ChemSpiderID_Ref', 'StdInChI_Ref', 'StdInChIKey_Ref') per Chem/Drugbox validation (report [[Wikipedia_talk:Wi← Previous edit |
Latest revision as of 20:49, 18 November 2024 edit undoAadirulez8 (talk | contribs)Extended confirmed users48,105 editsm v2.05 - Fix errors for CW project (Ordinal number found inside <sup> tags)Tag: WPCleaner |
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{{chembox |
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{{Chembox |
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| Watchedfields = changed |
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| verifiedrevid = 401618616 |
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| verifiedrevid = 470481620 |
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| ImageFile = TeflicAcid.png |
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| ImageFileL1 = Teflic_acid_2D_full.svg |
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| ImageSize = 150px |
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| ImageSizeL1 = 120 |
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| ImageAltL1 = Structural formula |
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| ImageFileR1 = Teflic-acid-3D-spacefill.png |
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| ImageSizeR1 = 120 |
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| ImageNameR1 = Space-filling model |
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| IUPACName = Pentafluoroorthotelluric acid |
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| IUPACName = Pentafluoroorthotelluric acid |
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| OtherNames = Teflic acid |
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| OtherNames = Teflic acid |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
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| ChemSpiderID = 10331773 |
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| ChemSpiderID = 10331773 |
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| InChI = 1/F5HOTe/c1-7(2,3,4,5)6/h6H |
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| InChI = 1/F5HOTe/c1-7(2,3,4,5)6/h6H |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |
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| StdInChIKey = OAOSLENTGBMCNC-UHFFFAOYSA-N |
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| StdInChIKey = OAOSLENTGBMCNC-UHFFFAOYSA-N |
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| CASNo_Ref = {{cascite|correct|CAS}} |
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| CASNo = |
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| PubChem = |
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| CASNo = 57458-27-2 |
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| SMILES = F(F)(F)(F)(F)O |
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| PubChem = 15243876 |
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| SMILES = F(F)(F)(F)(F)O |
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| Section2 = {{Chembox Properties |
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|Section2={{Chembox Properties |
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| Formula = HF<sub>5</sub>OTe |
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| Formula = {{chem2|HOTeF5}} |
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| H=1|O=1|Te=1|F=5 |
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| MolarMass = 239.6 |
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| Appearance = colorless solid |
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| Appearance = colorless solid |
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| pKa = 8.8 (in ])<ref name=P82db>{{cite book|title=Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution|editor-first=D. D.|editor-last=Perrin|edition=2nd|series=] Chemical Data|issue=29|publisher=Pergamon|location=Oxford|year=1982|publication-date=1984|orig-date=1969|lccn=82-16524|isbn=0-08-029214-3|at=Entry 220}}</ref> |
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| Density = |
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| MeltingPt = 39.1 °C |
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| MeltingPtC = 39.1 |
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| BoilingPt = 59.7 °C |
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| BoilingPtC = 59.7 |
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| Solubility = |
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| Solubility = |
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| Section3 = {{Chembox Hazards |
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|Section3={{Chembox Hazards |
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| GHSPictograms = {{GHS05}} |
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| MainHazards = corrosive, toxic |
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| FlashPt = |
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| GHSSignalWord = Danger |
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| HPhrases = {{H-phrases|314}} |
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| Autoignition = |
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| PPhrases = {{P-phrases|260|264|280|301+330+331|303+361+353|304+340|305+351+338|310|321|363|405|501}} |
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}} |
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| MainHazards = corrosive, toxic |
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| FlashPt = |
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'''Teflic acid''' is the ] with the ] HOTeF<sub>5</sub>. This strong ] is related to orthotelluric acid, Te(OH)<sub>6</sub>. Teflic acid has octahedral geometry and, Ignoring its bent Te-O-H bond, has ] C<sub>4v</sub>. |
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'''Teflic acid''' is a ] with the ] {{chem2|HOTeF5|auto=1}}. This strong ] is related to ], {{chem2|Te(OH)6}}. Teflic acid has a slightly distorted ]. |
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==Preparation== |
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==Preparation== |
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Teflic acid was accidentally discovered by Engelbrecht and Sladky. Their synthesis did not yield the anticipated telluryl fluoride {{chem2|TeO2F2}}, but a mixture of volatile telluric compounds, containing {{chem2|HOTeF5}}:<ref name=Engelbrecht>Engelbrecht, A.; Sladky, F. "Pentafluoro-orthotellursaure, {{chem2|HOTeF5}}" ''Angewandte Chemie'' '''1964'''. ''76''('''9'''), 379-380, {{doi|10.1002/ange.19640760912}}.</ref> |
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Teflic acid can be prepared from barium tellurate and ]:<ref name=Holl>Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.</ref> |
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:{{chem2|BaTeO4 + 10 FSO2OH → HOTeF5}} (25%) |
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:5HOSO<sub>2</sub>F + BaO<sub>2</sub>Te(OH)<sub>4</sub> → HOTeF<sub>5</sub> + 4 H<sub>2</sub>SO<sub>4</sub> + BaSO<sub>4</sub> |
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Teflic acid can also be prepared from ] and barium tellurate:<ref name=Holl>Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. {{ISBN|0-12-352651-5}}.</ref> |
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:{{chem2|5 FSO2OH + Ba(2+)(2−) → HOTeF5 + 4 H2SO4 + BaSO4}} |
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It is also the first hydrolysis product of ]: |
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It is also the first hydrolysis product of ]: |
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:{{chem2|TeF6 + H2O → HOTeF5 + HF}} |
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:TeF<sub>6</sub> + H<sub>2</sub>O → HOTeF<sub>5</sub> + HF |
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==Teflates== |
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==Teflates== |
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The ] of teflic acid is called the teflate anion, F<sub>5</sub>TeO<sup>-</sup> (not to be confused with ]). Many teflates are known, examples being B(OTeF<sub>5</sub>)<sub>3</sub> and the ] O(TeF<sub>5</sub>)<sub>2</sub>. Pyrolysis of the boron compound gives the dimer (TeF<sub>4</sub>O)<sub>2</sub><ref name=Holl/> |
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:2 B(OTeF<sub>5</sub>)<sub>3</sub> → 2 B(OTeF<sub>5</sub>)<sub>2</sub>F + (OTeF<sub>4</sub>)<sub>2</sub> |
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The ] of teflic acid is called the teflate anion, {{chem2|F5TeO-}} (not to be confused with ]). Many teflates are known, one example being {{chem2|B(OTeF5)3}}, that can be pyrolysed to give ] {{chem2|O(TeF5)2}}.<ref name=Holl/> |
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The teflate anion is known to resist oxidaton. This property has allowed the preparation several highly unusual species such as the hexateflates M(OTeF<sub>5</sub>)<sub>6</sub><sup>-</sup> (M = As, Sb, Bi). ] forms the ] Xe(OTeF<sub>5</sub>)<sup>+</sup>,<ref>Mercier, H. P.A.; Sanders, J. C. P.; Schrobilgen, G. J. "The Hexakis(pentafluorooxotellurato)pnictate(V) Anions, M(OTeF<sub>5</sub>)<sup>6-</sup> (M = As, Sb, Bi): A Series of Very Weakly Coordinating Anions" Journal of the American Chemical Society, volume 116, 2921, (1994). {{DOI|10.1021/ja00086a025}}.</ref> |
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:{{chem2|2 B(OTeF5)3 → 2 B(OTeF5)2F + O(TeF5)2}} |
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The teflate anion is known to resist oxidation. This property has allowed the preparation several highly unusual species such as the hexateflates {{chem2|M(OTeF5)6-}} (in which M = As, Sb, Bi). ] forms the ] {{chem2|Xe(OTeF5)+}}.<ref>Mercier, H. P.A.; Sanders, J. C. P.; Schrobilgen, G. J. "The Hexakis(pentafluorooxotellurato)pnictate(V) Anions, {{chem2|M(OTeF5)6-}} (M = As, Sb, Bi): A Series of Very Weakly Coordinating Anions" ''Journal of the American Chemical Society'', volume 116, 2921, (1994). {{doi|10.1021/ja00086a025}}.</ref> |
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==References== |
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==References== |
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{{Reflist}} |
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<references/> |
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==Further reading== |
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==Further reading== |
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*R.B. King; ''Inorganic Chemistry of Main Group Elements'', VCH Publishers, New York,1994. |
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*R.B. King; ''Inorganic Chemistry of Main Group Elements'', VCH Publishers, New York,1994. |
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] |
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{{Tellurium compounds}} |
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] |