✦ LIBER ✦

Synthesis and characterization of titanium ketimide complexes Ti(NCtBu2)nCl4−n (n = 1, 2): Ethylene polymerization studies

✍ Scribed by M. João Ferreira; Inês Matos; M. Teresa Duarte; M. Mercês Marques; Ana M. Martins

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 453 KB
Volume: 133-135
Category: Article
ISSN: 0920-5861
DOI: 10.1016/j.cattod.2007.11.054

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✦ Synopsis

6, are described. 1 was obtained from the reaction of TiCl 4 and Me 3 SiN C t Bu 2 and used as starting material for the preparation of 2 and 3. Complex 4 was obtained by reaction of 2 with PhCH 2 MgCl. Complexes 5 and 6 were prepared by addition of B(C 6 F 5 ) 3 to 3 and 4, respectively. The NMR spectra of 5 and 6 reveal that these complexes exist in solution as zwitterions with one benzyl ligand bridging the titanium and boron centres. Complexes 1 and 2 are ethylene polymerization catalysts when activated with MAO, displaying activities of 217.1 and 794.6 kg/(mol(Ti[E]) h), respectively.

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Synthesis and characterization of titanium ketimide complexes Ti(NCtBu2)nCl4−n (n&#xa0;=&#xa0;1, 2): Ethylene polymerization studies

✦ Synopsis

Synthesis and characterization of titanium ketimide complexes Ti(NCtBu2)nCl4−n (n = 1, 2): Ethylene polymerization studies