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Issue 17, 2006
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A general one-pot synthesis for elusive 2-substituted indenes: does bis[2-(tert-butyl)indenyl]zirconium(IV) dichloride/MAO polymerise ethene?

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Abstract

Among the 2-substituted indenes, 2-trifluoroindene and 2-tert-butylindene are poorly or incompletely described in the open literature. We herein describe an efficient one-pot synthesis of these compounds as a variation of the Perkin reaction which allows us to refute an earlier claim that bis(2-tert-butylindenyl)zirconium(IV) dichloride (2a) will not polymerise ethene. In fact, 2a/MAO polymerises ethene to extremely high molecular weights. Extensive DFT calculations on the polymerisation mechanism revealed an unprecedented suppression of the otherwise predominant chain termination by β-hydride transfer due to steric congestion of the active site.

Graphical abstract: A general one-pot synthesis for elusive 2-substituted indenes: does bis[2-(tert-butyl)indenyl]zirconium(iv) dichloride/MAO polymerise ethene?

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Publication details

The article was received on 14 Nov 2005, accepted on 26 Jan 2006 and first published on 06 Feb 2006


Article type: Paper
DOI: 10.1039/B516130D
Citation: Dalton Trans., 2006,0, 2098-2105
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    A general one-pot synthesis for elusive 2-substituted indenes: does bis[2-(tert-butyl)indenyl]zirconium(IV) dichloride/MAO polymerise ethene?

    A. C. Möller, R. Blom, R. H. Heyn, O. Swang, J. Kopf and T. Seraidaris, Dalton Trans., 2006, 0, 2098
    DOI: 10.1039/B516130D

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