Decacarbonyldihydridotriosmium
10lessOs-Os.png) |
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| Names | |
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IUPAC names
Decacarbonyldihydridotriosmium,
Decacarbonyl-1κ3C,2κ3C,3κ4C- |
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| Identifiers | |
| Properties | |
| H2Os3(CO)10 | |
| Molar mass | 852.81 g/mol |
| Appearance | Deep purple-violet crystals |
| Density | 3.48 g/cm3 |
| Boiling point | decomposes |
| no | |
| Solubility in other solvents | reacts with Chlorocarbons |
| Structure | |
| triangular cluster | |
| Hazards | |
| Main hazards | Toxic |
| Related compounds | |
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Related compounds
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Os3(CO)12 |
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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 | |
Decacarbonyldihydridotriosmium is an organoosmium compound with the formula H2Os3(CO)10. This purple-violet crystalline air-stable cluster is noteworthy because it is electronically unsaturated and hence adds a variety of substrates.
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). 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. It is prepared by purging a solution of Os3(CO)12 in octane (or other inert solvent of similar boiling point) with H2.
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.
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