5624878 Titanium (II) or zirconium (II) complexes and addition polymerization catalysts therefrom
| Autor: | James C. Stevens, David D. Devore, David R. Wilson, Mussell Robert D, Crawford Lenore H, Rosen Robert K, Francis J. Timmers |
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| Rok vydání: | 1997 |
| Předmět: |
Zirconium
Diene Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element Conjugated system Ring (chemistry) Catalysis chemistry.chemical_compound chemistry Cyclopentadienyl complex Group (periodic table) Polymer chemistry Moiety Addition polymer Physical and Theoretical Chemistry |
| Zdroj: | Journal of Molecular Catalysis A: Chemical. 125:171-172 |
| ISSN: | 1381-1169 |
| DOI: | 10.1016/s1381-1169(98)80079-4 |
| Popis: | Novel titanium or zirconium complexes containing one and only one cyclic delocalized, anionic, π-bonded, group, said complexes corresponding to formula (I), wherein: M is titanium or zirconium in the +2 formal oxidation state; L is a group containing a cyclic, delocalized, anionic, π-system through which the group is bound to M, and which group is also bound to Z; Z is a moiety bound to M via a σ-bond, comprising boron, or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen, said moiety having up to 60 non-hydrogen atoms; and X is a neutral, conjugated or nonconjugated diene, optionally substituted with one or more hydrocarbyl groups, said X having up to 40 carbon atoms and forming a π-complex with M; are catalytically activated for use as addition polymerization catalysts. Preferably, L is an optionally substituted cyclopentadienyl or fused ring cyclopentadienyl group. |
| Databáze: | OpenAIRE |
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