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Titanium and zirconium complexes containing the new 2,3-dimethyl-1,4-diphenylcyclopentadienyl ligand. Synthesis, characterization and polymerization behavior |
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| Institution: | a J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic b Department of Inorganic Chemistry, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic c Laboratoire de Synthèse et Electrosynthèse Organométalliques Associé au CNRS (UMR 5188), Faculté des Sciences, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France |
| Abstract: | An easy and inexpensive three-step synthesis of new 2,3-dimethyl-1,4-diphenylcyclopentadiene (3) ligand and the titanium and zirconium homometallocene dichlorides TiCl2(η5-C5H-2,3-Me2-1,4-Ph2)2] (4), ZrCl2(η5-C5H-2,3-Me2-1,4-Ph2)2] (5), and the mixed ligand zirconium complex ZrCl2(η5-C5H-2,3-Me2-1,4-Ph2)(η5-C5H5)] (6) prepared thereof are described. The polymerization of ethene using 4-6/MAO catalysts revealed that zirconocene complexes 5 and 6 displayed moderate and high activity, respectively, whereas the titanium catalyst 4/MAO was inactive. The crystal structures of 4 and 5 were determined by X-ray crystallography. |
| Keywords: | Titanocene Zirconocene 2 3-Dimethyl-1 4-diphenylcyclopentadiene Polymerization Ethene Crystal structure |
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