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Names | |
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Other names
Potassium osmate(VI) dihydrate
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Identifiers | |
3D model (
JSmol)
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ChemSpider | |
ECHA InfoCard | 100.157.189 |
EC Number |
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PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Properties | |
H4K2O6Os | |
Molar mass | 368.42 |
Appearance | purple solid |
Hazards | |
GHS labelling: | |
![]() | |
Danger | |
H301, H311, H330, H331 | |
P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P311, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Potassium osmate is the inorganic compound with the formula K2[OsO2(OH)4]. This diamagnetic purple salt contains osmium in the VI (6+) oxidation state. [1] When dissolved in water a pink solution is formed but when dissolved in methanol, the salt gives a blue solution. [1] The salt gained attention as a catalyst for the asymmetric dihydroxylation of olefins. [2]
The complex anion is octahedral. Like related d2 dioxo complexes, the oxo ligands are trans. [3] The Os=O and Os-OH distances are 1.75(2) and 1.99(2) Å, respectively. It is a relatively rare example of a metal oxo complex that obeys the 18e rule.
The compound was first reported by Edmond Frémy in 1844. [4] Potassium osmate is prepared by reducing osmium tetroxide with ethanol: [5]
Alkaline oxidative fusion of osmium metal also affords this salt. [1]
![]() | |
![]() | |
Names | |
---|---|
Other names
Potassium osmate(VI) dihydrate
| |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
ECHA InfoCard | 100.157.189 |
EC Number |
|
PubChem
CID
|
|
UNII | |
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
H4K2O6Os | |
Molar mass | 368.42 |
Appearance | purple solid |
Hazards | |
GHS labelling: | |
![]() | |
Danger | |
H301, H311, H330, H331 | |
P260, P261, P264, P270, P271, P280, P284, P301+P310, P302+P352, P304+P340, P310, P311, P312, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Potassium osmate is the inorganic compound with the formula K2[OsO2(OH)4]. This diamagnetic purple salt contains osmium in the VI (6+) oxidation state. [1] When dissolved in water a pink solution is formed but when dissolved in methanol, the salt gives a blue solution. [1] The salt gained attention as a catalyst for the asymmetric dihydroxylation of olefins. [2]
The complex anion is octahedral. Like related d2 dioxo complexes, the oxo ligands are trans. [3] The Os=O and Os-OH distances are 1.75(2) and 1.99(2) Å, respectively. It is a relatively rare example of a metal oxo complex that obeys the 18e rule.
The compound was first reported by Edmond Frémy in 1844. [4] Potassium osmate is prepared by reducing osmium tetroxide with ethanol: [5]
Alkaline oxidative fusion of osmium metal also affords this salt. [1]