Evaluation of catalytic activity in ethylene polymerization and ethylene/10-undecen-1-ol copolymerization of new orthopalladated complexes derived from tridentade ligands [C,N,S]

• Published in: Applied catalysis. A, General Vol. 417-418; pp. 1 - 5
• Main Authors: Ortega-Jiménez, Fernando, López-Cortés, José G., Ortega-Alfaro, M. Carmen, Penieres-Carrillo, J. Guillermo, Quijada, Raúl, Alvarez-Toledano, Cecilio
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 29.02.2012; Elsevier
• Subjects: Aluminum; Catalysis; Catalysts; Chemistry; Copolymerization; Ethylene; Ethylene polymerization; Exact sciences and technology; General and physical chemistry; Ligands; Molecular weight distribution; Orthopalladated complexes; Polymerization; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Ethylene polymerization; Orthopalladated complexes; Copolymerization; Polyethylene; Catalytic reaction; Complex system; Ethylene; Polymerization; Complexes; Distribution; Copolymer; Molecular mass; Catalyst; Tridentate ligand
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2011.12.006

[Display omitted] ► Orthopalladated complex/MAO systems have high activity in ethylene polymerization. ► Polyethylene obtained is linear with narrow molecular weight distributions. ► Orthopalladated complex/MAO systems produce ethylene/10-undecen-1-ol copolymer with high activities. ► Pd/Al systems behave as single site catalysts in both cases. This paper describes catalytic applications of new orthopalladated complex/MAO systems in polymerization of ethylene and copolymerization of ethylene/10-undecen-1-ol. Orthopalladated complexes 1–5 were synthesized from tridentate ligands [C, N, S], with a general formula of PdLX, where L=[Ph2NNC(CH3)CSRSR] and R=CH3, CH2CH2 and X=Cl, CCPh, CCSi(CH3)3. These catalytic systems show high catalytic activity in ethylene polymerization, especially when the reactions were carried out at a temperature of 80°C. The polyethylene obtained is linear with narrow molecular weight distributions, indicating that Pd/Al systems behave as single site catalysts. The results obtained in copolymerization of ethylene/10-undecen-1-ol indicate that orthopalladated complex/MAO system produces copolymers with molecular weight distributions unimodal and close to 2, indicating that the Pd/Al systems also act as single site catalysts.