Decacarbonyldihydridotriosmium

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.

Decacarbonyldihydridotriosmium
Names
IUPAC names
Decacarbonyldihydridotriosmium,
Decacarbonyl-1κ3C,2κ3C,3κ4C-di-μ-hydrido-1:2κ2H;1:2κ2H-triangulo-triosmium(3 OsOs)
Identifiers
3D model (JSmol)
  • InChI=1S/10CO.3Os.2H/c10*1-2;;;;;/q;;;;;;;;;;;2*+1;2*-1
    Key: ABHQEXNWCLZGFV-UHFFFAOYSA-N
  • [H-].[H-].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[Os].[Os+].[Os+]
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
Occupational safety and health (OHS/OSH):
Main hazards
Toxic
Related compounds
Related compounds
Os3(CO)12
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references

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

  1. Melvyn Rowen Churchill; Frederick J. Hollander; 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.
  2. Kaesz, H. D.; Glavee, G. N.; Angelici, R. J. (1990). Decacarbonyldi-μ-Hydridotriosmium: Os3(μ-H)2(CO)10. Inorganic Syntheses. Vol. 28. pp. 238–39. doi:10.1002/9780470132593.ch60. ISBN 978-0-470-13259-3.
  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.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.