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Please login to access the full content or check if you have access via2.11.10.2.3 Variation 3: Zwitterionic Bis(η5-cyclopentadienyl)zirconium(IV) Derivatives
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Negishi, E.-i.; Takahashi, T., Science of Synthesis, (2003) 2, 822.
None of the bis(η5-cyclopentadienyl)zirconium(IV) “ate” complexes containing one or more organo groups discussed in Sections 2.11.10.1 and 2.11.10.2, apart from 498 (R1 = Ph), have been obtained as crystalline compounds suitable for X-ray analysis. Consequently, their structures remain as no more than reasonable suggestions. Since 1998, however, several zwitterionic bis(η5-cyclopentadienyl)zirconium(IV) derivatives containing two or three Zr—C σ-bonds have been obtained as crystalline compounds, and their structures have been determined by X-ray analysis.[424–426] These studies have clearly established the existence of stable bis(η5-cyclopentadienyl)zirconium(IV) “ate” complexes. Most of these compounds have been prepared by the reaction of 1,1-bis(η5-cyclopentadienyl)-2-(diphenylphosphino)-1-zirconaindene (536) with appropriate π-compounds, as shown in Scheme 190.
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References
| [424] | Meeeee, M.; Meee, M.; Meeeeeeee, M.; Meeeeee, M.-M.; Meeee, M.; Meeeeee, M., M. Me. Meee. Mee., (8888) 888, 8888. |
| [425] | Meeeeeee, M.; Meee, M.; Meeeeeeee, M.; Meeeeeee, M.-M.; Meeeeee, M.-M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
| [426] | Meeeeeee, M.; Meeeeeee, M.; Meeeeeeee, M.; Meee, M.; Meeeeee, M.-M., Meeeeeeeeeeeeee, (8888) 88, 8888. |
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