Decacarbonyldihydridotriosmium

Decacarbonyldihydridotriosmium

Names
IUPAC names Decacarbonyldihydridotriosmium, Decacarbonyl-1κ3C,2κ3C,3κ4C-di-μ-hydrido-1:2κ2H;1:2κ2H-triangulo-triosmium(3 Os—Os)
Identifiers
CAS Number	41766-80-7 Y
3D model ( JSmol )	Interactive image
PubChem CID	139143320
InChI InChI=1S/10CO.3Os.2H/c10*1-2;;;;;/q;;;;;;;;;;;2*+1;2*-1 Key: ABHQEXNWCLZGFV-UHFFFAOYSA-N
SMILES [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
Chemical 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	insoluble
Solubility in other solvents	reacts with Chlorocarbons
Structure
Coordination geometry	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

Decacarbonyldihydridotriosmium is an

Structure and synthesis

The trinuclear cluster features an isosceles triangular array of metals with one short edge (r_Os-Os = 2.68 Å), which is spanned by the two hydride ligands, and two longer edges (r_Os-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]

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.^[4][5]

References