The Lanthanide Ziegler−Natta Model: Aluminum-Mediated Chain Transfer
2002; American Chemical Society; Volume: 21; Issue: 20 Linguagem: Inglês
10.1021/om020440u
ISSN1520-6041
AutoresMichael G. Klimpel, Jörg Eppinger, Peter Sirsch, Wolfgang Scherer, Reiner Anwander,
Tópico(s)Coordination Chemistry and Organometallics
ResumoC2-symmetric tetraalkylaluminate complexes rac-[Me2Si(2-Me-C9H5)2]Y(μ-R)2AlR2 and terminal alkyl complexes rac-[Me2Si(2-Me-C9H5)2]YR(THF) (R = Me, Et, iBu) are quantitatively formed via a special silylamide elimination reaction. The "reversibility" of tetraalkylaluminate coordination gives access to the first mixed-alkyl lanthanidocene complexes, which can be discussed as models for polymer chain transfer in organoaluminum-dependent Ziegler−Natta catalysts.
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