Английская Википедия:Cyclopentadienylmolybdenum tricarbonyl dimer

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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 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

  1. Шаблон:Cite web
  2. Шаблон:Cite journal
  3. Шаблон:Cite journal
  4. 4,0 4,1 Шаблон:Cite book
  5. Cotton, F. A.; Walton, R. A. "Multiple Bonds Between Metal Atoms" Oxford (Oxford): 1993, p 564ff. Шаблон:ISBN.

Шаблон:Molybdenum compounds Шаблон:Cyclopentadienide complexes