Interaction of the Negishi reagent Cp2ZrBun
2 with 1,4-bis(tert-butyl)butadiyne |
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| Authors: | V V Burlakov V S Bogdanov K A Lyssenko A Spannenberg P V Petrovskii W Baumann P Arndt M Kh Minacheva B N Strunin U Rosenthal V B Shur |
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| Institution: | 1. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 119991, Moscow, Russian Federation
2. Leibniz Institute of Catalysis, Rostock University, 29a Albert Einstein Strasse, D-18059, Rostock, Germany
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| Abstract: | The interaction of the Negishi reagent Cp2ZrBun 2 with 1,4-bis(tert-butyl)butadiyne ButC≡C-C≡CBut leads to four products: a five-membered zirconacyclocumulene complex Cp2Zr(η4-ButC4But) (2) synthesized earlier by another method, the previously unknown seven-membered zirconacyclocumulene Cp2Zrη4-ButC4(But)-C(C2But)=CBut] (3) as well as small amounts of the zirconocene binuclear butatrienyl complex Cp2(Bun)Zr(ButC4But)Zr(Bun)Cp2 (4), and the dimeric acetylide Cp2ZrC≡CBut]2 (5). The structure of complexes 2–5 was established by X-ray diffraction studies. |
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