pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes

Jutzi P, Mieling I, Neumann B, Stammler H-G (1997)
JOURNAL OF ORGANOMETALLIC CHEMISTRY 541(1-2): 9-17.

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Abstract
Deprotonation of dicyclopentadienyldimethylsilane with two equivalents of n-butyllithium and subsequent reaction with 1,2-dichlorotetramethyldisilane yields the double-bridged dicyclopentadiene H4C5(SiMe2)(Si2Me4)C5H4 (1 = H2L). Reaction of 1 with two equivalents of n-butyllithium leads to the dilithio compound Li-2 [H3C5(SiMe2)(Si2Me4)C5H3] (2 = Li2L) with the bridging dimethylsilyl and tetramethyldisilanyl group in 1,2 position (ortho-position) at each cyclopentadienyl unit 2 is used as starting material for the exemplary synthesis of the following metal complexes: Cp '' Cl2ZrLZrCl2Cp '' (3; Cp '' = 1,3-(t-Bu)(2)C5H3), Cp '' Cl2ZrLH (4); Me5C5RuLRuC5Me5 (syn: 5a; anti: 5b); syn-(CO)(2)CoLCo(CO)(2) (6). All compounds are characterized by spectroscopic and analytical data. X-ray crystal structures are presented for 1 and for 3. Stereochemical effects in metal complexes with the new unsymmetrically bridged dicyclopentadienyl ligand L are discussed.
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Jutzi P, Mieling I, Neumann B, Stammler H-G. pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes. JOURNAL OF ORGANOMETALLIC CHEMISTRY. 1997;541(1-2):9-17.
Jutzi, P., Mieling, I., Neumann, B., & Stammler, H. - G. (1997). pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 541(1-2), 9-17.
Jutzi, P., Mieling, I., Neumann, B., and Stammler, H. - G. (1997). pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes. JOURNAL OF ORGANOMETALLIC CHEMISTRY 541, 9-17.
Jutzi, P., et al., 1997. pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 541(1-2), p 9-17.
P. Jutzi, et al., “pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes”, JOURNAL OF ORGANOMETALLIC CHEMISTRY, vol. 541, 1997, pp. 9-17.
Jutzi, P., Mieling, I., Neumann, B., Stammler, H.-G.: pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes. JOURNAL OF ORGANOMETALLIC CHEMISTRY. 541, 9-17 (1997).
Jutzi, Peter, Mieling, I, Neumann, B, and Stammler, Hans-Georg. “pi-H3C5(Me2Si)(Me2SiSiMe2)-pi-C5H3: A novel and simple double-bridged dicyclopentadienyl ligand: Synthesis and example of its application in the chemistry of complexes”. JOURNAL OF ORGANOMETALLIC CHEMISTRY 541.1-2 (1997): 9-17.
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