1,2,3,4-Tetramethylfulvene was prepared by hydride abstraction from pentamethylcyclopentadienyl anion and was converted to the fulvenebridged dinuclear complex (η1:η5CH2C5Me4)Fe2(CO)6 by treatment with Fe2(CO)9. Reaction of this complex with phosphine L (L = PMe3, PPh3, PH2PCH2PPh2, or PPh2H) caused replacement of a CO ligand with L to provide (η1:η5-CH2C5Me4)Fe2(CO)5L in high yield. The structure of (η1:η5-CH2C5Me4) Fe2(CO)5Ph2 PCH2PPh2) was determined by X-ray crystal structure analysis: C40H36Fe2O5P2, monoclinic, P21/a; a = 20.334(5) Å, b = 10.978(2) Å, c = 18.525(5) Å, β = 116.17(2)°, V = 3711.2(4) Å3, Z = 4. When Ph2P(CH2)2PPh2 was used as L, each of the phosphorus atoms made a bond to a diiron unit to give the tetranuclear complex [(η1:η5-CH2C5Me4)Fe2(CO)5]2(μ-L). The PPh2H complex (η1:η5-CH2C5Me4)Fe2(CO)5(PPh2H) rearranged in hot benzene to a new phosphidobridged dinuclear complex, (C6Me5)Fe2(CO)4(η-CO)(η-PPh2).
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry