Issue 11, 2000
From the journal:

Journal of the Chemical Society, Dalton Transactions

Synthesis and structural characterisation of new ansa-bis(propene)s and {ansa-bis(allyl)}alkali metal and {ansa-bis(allyl)}transition metal complexes

Rafael Fernández-Galán,a   Peter B. Hitchcock,a   Michael F. Lappert,*a   Antonio Antiñoloa  and  Ana M. Rodrígueza  

* Corresponding authors

a The Chemistry Laboratory, University of Sussex, Brighton, UK
E-mail: M.F.Lappert@sussex.ac.uk

b Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Química, Universidad de Castilla-La Mancha, Avda Camilo José Cela 10, Ciudad Real, Spain

Abstract

The new ansa-bis(propene)s, R2Si(CH2CH[double bond, length half m-dash]CHSiR′3)2 (R = R′ = Me 1; R = Ph, R′ = Me 2; R = R′ = Ph 3; R = Me, R′ = Ph 4; R = Me, R′ = Me2But5) have been prepared by lithiation of the appropriate 3-silylpropene and quenching with SiCl2R2 (R = Me or Ph). The η3-ansa-bis(allyllithium) compounds [{Li(tmen)}2{3-(η3-C3H3SiR′3-1)2}SiR2] (R = R′ = Me 6; R = Ph, R′ = Me 7; R = R′ = Ph 8; R = Me, R′ = Ph 9; R = Me, R′ = Me2But10) complexes were obtained from of the appropriate ansa-bis(propene) and LiBun. The lithium complex 6 was transformed into the potassium complex [K2{3-(η3-C3H3SiMe3-1)2SiMe2}] 11 and into [Hf{3-(η3-C3H3SiMe3-1)2SiMe2}2] 13 by reaction with KOBut or HfCl4, respectively. From 11 and ZrCl4 [Zr{3-(η3-C3H3SiMe3-1)2SiMe2}2] 12 was obtained. Single crystal X-ray structures of complexes 4, 6 and 12 are presented. Complex 12, in presence of methylaluminoxane (MAO), was an active catalyst for the polymerisation of ethylene.

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Article information

DOI
https://doi.org/10.1039/B000451K
Article type
Paper
Submitted
17 Jan 2000
Accepted
05 Apr 2000
First published
11 May 2000

J. Chem. Soc., Dalton Trans., 2000, 1743-1749

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Synthesis and structural characterisation of new ansa-bis(propene)s and {ansa-bis(allyl)}alkali metal and {ansa-bis(allyl)}transition metal complexes

R. Fernández-Galán, P. B. Hitchcock, M. F. Lappert, A. Antiñolo and A. M. Rodríguez, J. Chem. Soc., Dalton Trans., 2000, 1743 DOI: 10.1039/B000451K

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