Synthese, Struktur und Reaktivität von [1]Borametallocenophanen

The synthesis of bis(cyclopentadienyl)- R2NB(eta5-C5H5)2 diindenyl- R2NB(eta5-C9H7)2 and mixed aminoboranes of the type R2NB(eta5-C5H5)(eta5-C9H7) (R = various alkyl) was described and the structure of the compounds in solution was determined by various NMR-methods. These ligand precursor molecules were reacted with group IV metal compounds. Various [1]Borametallocenophane complexes of all the group IV metals were obtained in high yield by a very efficient, convenient, multistep one-pot synthesis. By this method not only the bis(cyclopentadienyl)- and diindenyl complexes [{R2NB(eta5-C5H4)2}MCl2] (M = Ti, Zr, Hf; R = various alkyl, Me3Si) were obtained, but also complexes with two different eta5-coordinated ligands such as [{R2NB(eta5-C5H4)(eta5-C9H6)}MCl2] (M = Ti, Zr; R = various alkyl). Some of the complexes were chosen to investigate their catalytic properties with respect to Ziegler-Natta-type polymerisation of olefins, and proved to be highly efficient for the preparation of polyethylene. Also a new class of complexes – e. g. boron-bridged constrained geometry complexes – was obtained and characterized in solution and solid state.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2000

Author dc:creator

• von Koblinski, Carsten

Contributors dc:contributor

• Braunschweig, Holger

• info:eu-repo/classification/ddc/540
• Chemie
• Borkomplexe
• Metallocene
• Cyclophane

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-118406%22

OAI record oai:identifier

https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A56289