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Names | |
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IUPAC name bis(tricarbonyl[η5-cyclopentadienyl] | |
Other names cyclopentadienyl molybdenum carbonyl dimer Bis(tricarbonylcyclopentadienylmolybdenum) | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.031.948 |
EC Number |
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PubChem CID | |
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Properties | |
Mo2(η-C5H5)2(CO)6 | |
Molar mass | 490.15 g·mol−1 |
Appearance | dark red crystalline solid |
Melting point | 222 °C (432 °F; 495 K) |
Boiling point | dec. |
insoluble | |
Structure | |
monoclinic | |
0.112 D | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards | flammable |
GHS labelling: | |
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Danger | |
H302, H312, H332 | |
Related compounds | |
Related compounds | (η-C5H5)2Mo2(CO)4 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). |
Cyclopentadienylmolybdenum tricarbonyl dimer is the chemical compound with the formula Cp2Mo2(CO)6, where Cp is C5H5. A dark red solid, it has been the subject of much research although it has no known practical uses.
The molecule exists in two rotamers, gauche and anti. [1] The six CO ligands are terminal and the Mo-Mo bond distance is 3.2325 Å. [2] The compound is prepared by treatment of molybdenum hexacarbonyl with sodium cyclopentadienide followed by oxidation of the resulting NaMo(CO)3(C5H5). [3] Other methods have been developed starting with Mo(CO)3(CH3CN)3 instead of Mo(CO)6. [4]
Thermolysis of this compound in hot solution of diglyme (bis(2-methoxyethyl)ether) results in decarbonylation, giving the tetracarbonyl, [4] which has a formal triple bond between the Mo centers (dMoMo = 2.448 Å): [5]
The resulting cyclopentadienylmolybdenum dicarbonyl dimer in turn binds a variety of substrates across the metal-metal triple bond.
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