Decacarbonyldihydridotriosmium
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| Decacarbonyldihydridotriosmium | |
|---|---|
10.png/250px-H2Os3(CO)10.png) |
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| IUPAC name | Decacarbonyldihydridotriosmium, decacarbonyl-1κ3C,2κ3C,3κ4C- di-μ-hydrido-1:2κ2H;1:2κ2H -triangulo-triosmium(3 Os—Os) |
| Identifiers | |
| CAS number | [41766-80-7] |
| Properties | |
| Molecular formula | H2Os3(CO)10 |
| Molar mass | 852.81 g/mol |
| Appearance | Deep purple-violet crystals |
| Density | 3.48 g/cm3 |
| Boiling point |
decomposes |
| Solubility in water | no |
| Solubility in other solvents | decomp in Chlorocarbons |
| Structure | |
| Coordination geometry |
triangular cluster |
| Hazards | |
| Main hazards | Toxic |
| Related compounds | |
| Related compounds | Os3(CO)12 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Decacarbonyldihydridotriosmium is a chemical 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.
[edit] Structure and synthesis
The trinuclear cluster features a isoscelese 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. It is prepared by purging a solution of Os3(CO)12 in octane (or other inert solvent of similar boiling point) with H2.[2]
- Os3(CO)12 + H2 → Os3H2(CO)10 + 2 CO
[edit] Reactions
The cluster reacts with a wide range of reagents under mild conditions. Illustrative is its reaction with [Ni(CO)(C5H5)]2 to give [Ni(C5H5)]3Os3(CO)9. With diazomethane, it gives Os3(CO)10(μ-H)(μ-CH3), exhibiting an agostic interaction, the first identified in a metal cluster.[3]
[edit] References
- ^ Melvyn Rowen Churchill, Frederick J. Hollander, and John P. Hutchinson (1977). "Structural studies on polynuclear osmium carbonyl hydrides. 5.Crystal structure and molecular geometry of di-μ-hydrido-decacarbonyltriosmium, (μ-H)2Os3(CO)10". Inorg. Chem. 28: 2697–2700. doi:.
- ^ Kaesz, H. D. (1990). "Decacarbonyldi-μ-Hydridotriosmium: Os3(μ-H)2(CO)10". Inorganic Syntheses 28: 238–39. doi:.
- ^ R. Bruce Calvert, John R. Shapley (1977). "Activation of hydrocarbons by unsaturated metal cluster complexes. 6. Synthesis and characterization of methyldecacarbonylhydridotriosmium, methylenedecacarbonyldihydridotriosmium, and methylidynenonacarbonyltrihydridotriosmium. Interconversion of cluster-bound methyl and methylene ligands". J. Am. Chem. Soc. 99: 5225–5226. doi:.
