Cyclopentadienylchromium tricarbonyl dimer

Chemical compound From Wikipedia, the free encyclopedia

Cyclopentadienylchromium tricarbonyl dimer is the organochromium compound with the formula Cp2Cr2(CO)6, where Cp is C5H5. It is a dark green crystalline solid, existing in measurable equilibrium quantities with the monometallic radical CpCr(CO)3.

Quick facts Names, Identifiers ...
Cyclopentadienylchromium tricarbonyl dimer
Names
IUPAC name
bis(tricarbonyl[η5-cyclopentadienyl]chromium)(Cr—Cr)
Other names
cyclopentadienyl chromium carbonyl dimer
Bis(tricarbonylcyclopentadienylchromium)
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/2C5H5.6CO.2Cr/c2*1-2-4-5-3-1;6*1-2;;/h2*1-5H;;;;;;;;
    Key: VIBRSGQAZCSDSN-UHFFFAOYSA-N
  • c1[cH-]ccc1.[O+]#C[Cr-2](C#[O+])(C#[O+])[Cr-2](C#[O+])(C#[O+])(C#[O+]).c1[cH-]ccc1
Properties
C16H10Cr2O6
Molar mass 402.242 g·mol−1
Appearance green solid
Density 2.738 g/cm3
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).
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Structure and synthesis

The six CO ligands are terminal, and the Cr-Cr bond distance is 3.281 Å, 0.06 Å longer than the related dimolybdenum compound.[1] The compound is prepared by treatment of chromium hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaCr(CO)3(C5H5).[2]

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References

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