Decacarbonyldihydridotriosmium is an organoosmium compound with the formula H2Os3(CO)10. This purple-violet crystalline air-stable cluster is noteworthy because it is electron-deficient and hence adds a variety of substrates.
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IUPAC names
Decacarbonyldihydridotriosmium,
Decacarbonyl-1κ3C,2κ3C,3κ4C- | |
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3D model (JSmol)
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PubChem CID
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Properties | |
H2Os3(CO)10 | |
Molar mass | 852.81 g/mol |
Appearance | Deep purple-violet crystals |
Density | 3.48 g/cm3 |
Boiling point | decomposes |
insoluble | |
Solubility in other solvents | reacts with Chlorocarbons |
Structure | |
triangular cluster | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Toxic |
Related compounds | |
Related compounds
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Os3(CO)12 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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The trinuclear cluster features an isosceles triangular array of metals with one short edge (rOs-Os = 2.68 Å), which is spanned by the two hydride ligands, and two longer edges (rOs-Os = 2.81 Å).[1] It can be described as Os(CO)4[Os(CO)3(μ-H)]2. The bonding in the Os2H2 subunit has been compared to the 3-center, 2e bonding in diborane. The molecule forms a variety of adducts with loss of H2.[2]
It is prepared by purging a solution of Os3(CO)12 in octane (or other inert solvent of similar boiling point) with H2.[3]
The cluster reacts with a wide range of reagents under mild conditions. Illustrative is its reaction with diazomethane to give Os3(CO)10(μ-H)(μ-CH3), exhibiting an agostic interaction, the first identified in a metal cluster.[4][5]