Cyclopentadienyltungsten tricarbonyl dimer

Cyclopentadienyltungsten tricarbonyl dimer

Names
IUPAC name bis(tricarbonyl[η5-cyclopentadienyl]tungsten)(W—W)
Other names cyclopentadienyl tungsten carbonyl dimer Bis(tricarbonylcyclopentadienyltungsten)
Identifiers
CAS Number	12566-66-4  Y
3D model (JSmol)	Interactive image
ChemSpider	10159961
ECHA InfoCard	100.149.757
PubChem CID	45051817
InChI InChI=1S/2C5H5.6CO.2W/c2*1-2-4-5-3-1;6*1-2;;/h2*1-5H;;;;;;;; Key: QHDDHZCGENYXAV-UHFFFAOYSA-N
SMILES [C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[CH]1[CH][CH][CH][CH]1.[CH]1[CH][CH][CH][CH]1.[W].[W]
Properties
Chemical formula	C16H10O6W2
Molar mass	665.93 g·mol−1
Appearance	red solid
Density	2.738 g/cm3
Solubility in water	insoluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Cyclopentadienyltungsten tricarbonyl dimer is the organotungsten compound with the formula Cp₂W₂(CO)₆, where Cp is C₅H₅. A dark red crystalline solid, it is the subject of research, although it has no or few practical uses.

Structure and synthesis

The molecule exists in two rotamers, gauche and anti. ^[1] The six CO ligands are terminal, and the W-W bond distance is 3.222 Å. ^[2] The compound is prepared by treatment of tungsten hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaW(CO)₃(C₅H₅). ^[3]

Related compounds

• Cyclopentadienylmolybdenum tricarbonyl dimer
• Cyclopentadienylchromium tricarbonyl dimer

References

1. Brian Mann (1997-01-06). "Fluxionality of Cp₂Mo₂(CO)₆". University of Sheffield.
2. R. D. Adams, D. M. Collins, and F. A. Cotton (1974). "Molecular Structures and Barriers to Internal Rotation in Bis(η5 -cyclopentadienyl)hexacarbonylditungsten and Its Molybdenum Analog". Inorg. Chem. 13 (5): 1086–1090. doi: 10.1021/ic50135a015 .
3. Manning, A. R.; Hacket, Paul; Birdwhistell, Ralph (1990). "Hexacarbonylbis(η⁵-Cyclopentadienyl)Dichromium, Molybdenum, and Tungsten and their Analogs, M₂(η⁵-C₅H₄r)₂(Co)₆ (M = Cr, Mo, and W; R = H, Me or PHCH₂)". Inorganic Syntheses. Vol. 28. pp. 148–149. doi:10.1002/9780470132593.ch39. ISBN   9780470132593.