Decacarbonyldihydridotriosmium
| Decacarbonyldihydridotriosmium | ||
|---|---|---|
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| IUPAC name Decacarbonyldihydridotriosmium, | ||
| 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 | reacts with Chlorocarbons | |
| Structure | ||
| Coordination geometry |
triangular cluster | |
| Hazards | ||
| Main hazards | Toxic | |
| Related compounds | ||
| Related compounds | Os3(CO)12 | |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| 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.
Structure and synthesis
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. 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
Reactions
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.[3]
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 (11): 2697–2700. doi:10.1021/ic50177a006.
- ↑ Kaesz, H. D.; Glavee, G. N.; Angelici, R. J. (1990). "Decacarbonyldi-μ-Hydridotriosmium: Os3(μ-H)2(CO)10". Inorganic Syntheses. Inorganic Syntheses 28: 238–39. doi:10.1002/9780470132593.ch60. ISBN 978-0-470-13259-3.
- ↑ 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 (15): 5225–5226. doi:10.1021/ja00457a077.
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