Palladium and nickel complexes of (P,N)-ligands based on quinolines: Catalytic activity for polymerization and oligomerization |
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Authors: | Doina Sirbu Sebastian Gischig |
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Institution: | a Eidgenössische Technische Hochschule, Institut für Chemie und Bioingenieurwissenschaften, Hönggerberg, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland b Eidgenössische Technische Hochschule, Laboratorium für Anorganische Chemie, Hönggerberg, CH-8093 Zürich, Switzerland |
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Abstract: | Four (P,N)-ligands (1-4) with different steric and electronic properties were synthesized. They were used to prepare the monocationic palladium complexes Pd(P,N)(CH3)(NCCH3)](PF6) (9-12). The structures of the newly prepared ligand 3 and the neutral palladium complex Pd(P,N)(CH3)Cl] (10) were analysed by X-ray. The catalytic activity of the palladium complexes toward the copolymerization of styrene and ethylene with CO was low or non-existent. The nickel complexes Ni(P,N)(1-naphthyl)Cl] (13-16), modified with the ligands 1-4, were prepared and their catalytic activity toward ethylene oligomerization was studied. They showed high activity at ambient temperature and low ethylene pressure (1-12 bar) in the presence of MAO. |
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Keywords: | Quinoline (P N)-ligands Palladium Nickel Oligomerization Ethylene |
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