Torsional Isomerism in Metallocenes: Hindered Cp-Rotation in (s-cis-η-Butadiene)-bis(η-tert-butylcyclopentadienyl)zirconium

Torsional Isomerism in Metallocenes: Hindered Cp-Rotation in (s-cis-η-Butadiene)-bis(η-tert-butylcyclopentadienyl)zirconium

Three isomers of the title compound, a butadiene‐zirconocene with tert‐butyl substituents, could be identified at 310 K by NMR spectroscopy. In contrast to metallocenes with unsubstituted cyclopentadienyl groups, the rotation of the tBuC5H4 groups is a high‐energy process.

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Veröffentlicht in:Angewandte Chemie International Edition 1985-04, Vol.24 (4), p.321-323
Hauptverfasser: Erker, Gerhard, Mühlenbernd, Thomas, Benn, Reinhard, Rufińska, Anna, Tsay, Yi-Hung, Krüger, Carl
Format: Artikel
Sprache:eng
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Zusammenfassung:Three isomers of the title compound, a butadiene‐zirconocene with tert‐butyl substituents, could be identified at 310 K by NMR spectroscopy. In contrast to metallocenes with unsubstituted cyclopentadienyl groups, the rotation of the tBuC5H4 groups is a high‐energy process.
ISSN:0570-0833
1521-3773
DOI:10.1002/anie.198503211