The first synthesised examples of di-siloxy-substituted cyclopentadienyl zirconocenes, their synthesis, structure and activity in ethylene polymerisation
| Autor: | Ilpo Mutikainen, Ove Andell, Shaozhong Ge, Tuula Telén, Antti Penninkangas, Janne Maaranen |
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| Rok vydání: | 2006 |
| Předmět: |
Steric effects
Zirconium Ethylene 010405 organic chemistry Ligand Stereochemistry Organic Chemistry chemistry.chemical_element Crystal structure 010402 general chemistry 01 natural sciences Biochemistry Medicinal chemistry 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Cyclopentadienyl complex chemistry Polymerization Materials Chemistry Physical and Theoretical Chemistry Metallocene |
| Zdroj: | Journal of Organometallic Chemistry. 691:122-130 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/j.jorganchem.2005.08.029 |
| Popis: | Bis-(1,2-(RMe2SiO)2)ZrCl2 complexes with R = Me-(5a), iPr-(5b) and tBu-(5c) have been synthesised in good yields and characterised. Compounds 5a–c are the first synthesised examples of multi-siloxy-substituted cyclopentadienyl metallocenes. The siloxy-substituents have a for siloxy substituted metallocenes unique steric arrangement, with one almost in the same plane, and the other nearly perpendicular to the plane of the cyclopentadienyl ligand of the zirconocene. The ethylene/1-hexene co-polymerisation activity using methylalumoxane as co-activator gives low activities, with compound 5c (262.92 kg(PE)/g(Zr)/h) being the most active. |
| Databáze: | OpenAIRE |
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