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  • Cyclopentadienyl complexes
  • Chemical compounds containing metal–metal bonds
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    Cyclopentadienyltungsten tricarbonyl dimer

    Topic: Chemistry

     From Handwiki - Reading time: 3 min
    Cyclopentadienyltungsten tricarbonyl dimer
    Names
    IUPAC name
    bis(tricarbonyl[η5-cyclopentadienyl]tungsten)(W—W)
    Other names
    cyclopentadienyl tungsten carbonyl dimer
    Bis(tricarbonylcyclopentadienyltungsten)
    Identifiers
    3D model (JSmol)
    ChemSpider
    Properties
    C16H10O6W2
    Molar mass 665.93 g·mol−1
    Appearance red solid
    Density 2.738 g/cm3
    insoluble
    Hazards
    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]

    References

    1. ↑ Brian Mann (1997-01-06). "Fluxionality of Cp2Mo2(CO)6". University of Sheffield. http://brian-mann.staff.shef.ac.uk/Cp2Mo2CO6.html. 
    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 28: 148–149. doi:10.1002/9780470132593.ch39. ISBN 9780470132593. 



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