Cyclopentadienylmolybdenum tricarbonyl dimer
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| Template:Longitem | Mo2(η-C5H5)2(CO)6 |
| Molar mass | Template:Chem molar mass |
| Appearance | dark red crystalline solid |
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| Template:Longitem | monoclinic |
| Template:Longitem | 0.112 D |
| Template:Longitem | (η-C5H5)2Mo2(CO)4 |
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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.
Structure and synthesis
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]
Reactions
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]
- (C5H5)2Mo2(CO)6 → (C5H5)2Mo2(CO)4 + 2 CO
The resulting cyclopentadienylmolybdenum dicarbonyl dimer in turn binds a variety of substrates across the metal-metal triple bond.
Related compounds
References
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- ↑ Cotton, F. A.; Walton, R. A. "Multiple Bonds Between Metal Atoms" Oxford (Oxford): 1993, p 564ff. Template:ISBN.
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