| Revision as of 11:14, 13 October 2011 editGil Gamesh (talk | contribs)Extended confirmed users14,734 editsm dab← Previous edit |
Latest revision as of 04:55, 13 March 2023 edit undo85.140.22.227 (talk) fix mistake in the formula |
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{{chembox |
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| ImageFile = OsCl4structure.jpg |
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| ImageFile = OsCl4structure.jpg |
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| ImageSize = |
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| IUPACName = Osmium(IV) chloride |
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| IUPACName = Osmium(IV) chloride |
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| OtherNames = Osmium chloride, osmium tetrachloride |
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| OtherNames = Osmium chloride, osmium tetrachloride |
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| Section1 = {{Chembox Identifiers |
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|Section1={{Chembox Identifiers |
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| Abbreviations = |
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| Abbreviations = |
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| CASNo_Ref = {{cascite|correct|??}} |
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| CASNo = 10026-01-4 |
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| CASNo = 10026-01-4 |
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| UNII_Ref = {{fdacite|changed|FDA}} |
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| UNII = 950AA6B72O |
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| EINECS = |
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| EINECS = |
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| PubChem = |
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| PubChem = 4070891 |
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| SMILES = |
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| SMILES = Cl(Cl)(Cl)Cl |
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| InChI = |
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| InChI = 1S/4ClH.Os/h4*1H;/q;;;;+4/p-4 |
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| RTECS = |
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| MeSHName = |
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| KEGG_Ref = {{keggcite|correct|kegg}} |
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| KEGG_Ref = {{keggcite|correct|kegg}} |
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| KEGG = |
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| Formula = OsCl<sub>4</sub> |
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| Formula = OsCl<sub>4</sub> |
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| MolarMass = 332.041 g/mol |
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| MolarMass = 332.041 g/mol |
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| Appearance = red-black ] crystals |
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| Appearance = red-black ] crystals |
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| Density = 4.38 g/cm³ |
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| Density = 4.38 g/cm<sup>3</sup> |
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| MeltingPt = decomposes at 323°C |
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| MeltingPt = decomposes at 323°C |
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| BoilingPt = |
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| Solubility = reacts with water |
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| Solubility = reacts with water |
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| SolubleOther = soluble in hydrochloric acid |
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| SolubleOther = soluble in hydrochloric acid |
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| pKa = |
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| pKb = }} |
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| Section3 = {{Chembox Structure |
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| CrystalStruct = Orthorhombic, ] |
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| CrystalStruct = Orthorhombic, ] |
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| SpaceGroup = Cmmm, No. 65 |
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| SpaceGroup = Cmmm, No. 65 |
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| FlashPt = |
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| PEL = }} |
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| PEL = }} |
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| Section8 = {{Chembox Related |
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| OtherAnions = ] |
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| OtherAnions = ] |
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| OtherCations = ]<br />]<br/>] |
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| OtherCations = ]<br />]<br/>] |
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==Preparation, structure, reactions== |
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==Preparation, structure, reactions== |
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It was first reported in 1909 as the product of chlorination of osmium metal.<ref>{{cite journal | title = Über das Osmium, seine analytische Bestimmung, seine Oxyde und seine Chloride" | author = Otto Ruff and Ferd. Bornemann | journal = ] | year = 1910 | volume = 65 | pages = 429–456 | doi = 10.1002/zaac.19100650126}}</ref> |
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It was first reported in 1909 as the product of chlorination of osmium metal.<ref>{{cite journal | title = Über das Osmium, seine analytische Bestimmung, seine Oxyde und seine Chloride | author = Otto Ruff and Ferd. Bornemann | journal = ] | year = 1910 | volume = 65 | pages = 429–456 | doi = 10.1002/zaac.19100650126| url = https://zenodo.org/record/1428118 }}</ref> |
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This route affords the high temperature polymorph:<ref>{{cite book | author = Cotton, S. A. | title = Chemistry of Precious Metals | publisher = Chapman and Hall | location = London | year = 1997 | isbn = 0751404136}}</ref> |
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This route affords the high temperature polymorph:<ref>{{cite book | author = Cotton, S. A. | title = Chemistry of Precious Metals | publisher = Chapman and Hall | location = London | year = 1997 | isbn = 0-7514-0413-6}}</ref> |
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:Os + 2 Cl<sub>2</sub> → OsCl<sub>4</sub> |
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:Os + 2 Cl<sub>2</sub> → OsCl<sub>4</sub> |
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This reddish-black polymorph is ] and adopts a structure in which osmium centres are octahedrally coordinated, sharing opposite edges of the OsCl<sub>6</sub> octahedra to form a chain.<ref>{{cite journal | author = Wells A.F. | year = 1984 | title = Structural Inorganic Chemistry | edition = 5th | publisher = Oxford Science Publications | isbn = 0-19-855370-6}}</ref> A brown, apparently cubic polymorph forms upon reduction of ] with ]:<ref>{{cite journal | author = Paul Machmer | title = On the polymorphism of osmium tetrachloride | journal = ] | year = 1967 | pages = 610a–610a | doi = 10.1039/C1967000610A | issue = 12}}</ref> |
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This reddish-black polymorph is ] and adopts a structure in which osmium centres are octahedrally coordinated, sharing opposite edges of the OsCl<sub>6</sub> octahedra to form a chain.<ref>{{cite book | author = Wells A.F. | year = 1984 | title = Structural Inorganic Chemistry | edition = 5th | publisher = Oxford Science Publications | isbn = 0-19-855370-6}}</ref> A brown, apparently cubic polymorph forms upon reduction of ] with ]:<ref>{{cite journal | author = Paul Machmer | title = On the polymorphism of osmium tetrachloride | journal = ] | year = 1967 | pages = 610a | doi = 10.1039/C1967000610A | issue = 12}}</ref> |
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:OsO<sub>4</sub> + 4 SOCl<sub>2</sub> → OsCl<sub>4</sub> + 2 Cl<sub>2</sub> + 4 SO<sub>2</sub> |
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:OsO<sub>4</sub> + 2 SOCl<sub>2</sub> → OsCl<sub>4</sub> + 2 Cl<sub>2</sub> + 2 SO<sub>2</sub> |
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Osmium tetraoxide dissolves in ] to give the hexachloroosmate anion: |
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Osmium tetraoxide dissolves in ] to give the hexachloroosmate anion: |
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:OsO<sub>4</sub> + 8 HCl → H<sub>2</sub>OsCl<sub>6</sub> + Cl<sub>2</sub> + 4 H<sub>2</sub>O |
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:OsO<sub>4</sub> + 10 HCl → H<sub>2</sub>OsCl<sub>6</sub> + 2 Cl<sub>2</sub> + 4 H<sub>2</sub>O |
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==References== |
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==References== |
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{{Osmium compounds}} |
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{{Osmium compounds}} |
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{{Chlorides}} |
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{{inorganic-compound-stub}} |
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