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Bis(η⁵-cyclopentadienyl)- and bis(η⁵-indenyl)metallacycles of titanium and zirconium from methylenecyclopropanes by oxidative coupling

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Binger,  P.
Research Group Binger, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Research Group Binger, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Podubrin,  S.
Research Group Binger, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Albus,  S.
Research Group Binger, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Krüger,  C.
Service Department Krüger (XRAY), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Binger, P., Müller, P., Podubrin, S., Albus, S., & Krüger, C. (2002). Bis(η⁵-cyclopentadienyl)- and bis(η⁵-indenyl)metallacycles of titanium and zirconium from methylenecyclopropanes by oxidative coupling. Journal of Organometallic Chemistry, 656(1-2), 288-298. doi:10.1016/S0022-328X(02)01472-9.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-99A8-1
Abstract
Methylenecyclopropane (1a) reacts with bis(trimethylphosphane)titanocene (8) and (eta(2)-1- butene)(trimethylphosphane)zirconocene (12a) via olefin complexes; e.g. 9, in a [2+2] cycloaddition to afford the metallacyclopentane derivates 10, 13 and 14. In contrast, a [3+2] cycloaddition reaction is observed with bis(eta(5)- Indenyl)(eta(2)-1-butene)(trimethylphosphane)zirconium (12b) to furnish the 1-zircona-4-methylenecyclohexane 15. Similarly, reactions of the complexes 8 and 12a with benzylidenecyclopropane (1c) give the olefin complexes 9c and 20, while a direct reaction between the indenyl complex 12b with le occurs to furnish the 1-zircona-2- benzylidenecyclobutane complex 21b which was characterised by X-ray crystallography. (C) 2002 Elsevier Science B.V. All rights reserved.