Ethylene Polymerization by Self-Immobilized Neutral Nickel Catalysts Bearing Allyl Groups

✍ Scribed by Dao Zhang; Guo-Xin Jin; Ning-Hai Hu

• Book ID: 102168400
• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 146 KB
• Volume: 2003
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200390205

✦ Synopsis

Abstract

[Ni(Ph)(PPh~3~)(N,O)] complexes containing phenylimino‐phenolato ligands (N,O) (1: N,O = A; 2: N,O = B; 3: N,O = C; 4: N,O = D; 5: N,O = E) have been synthesized and characterized. The molecular structure of 4 was determined by single‐crystal X‐ray analysis. Complexes 2−5 bearing allyl groups have been investigated as self‐immobilized catalysts for ethylene polymerization without the use of co‐catalysts. The high ethylene polymerization activities of ca. 10^5^ g·PE mol^−1^ Ni·h^−1^ and high molecular weight (M~w~ ≈︁ 10^5^) of polyethylene could be accomplished by changing the ligand structures and reaction conditions. The self‐immobilization of catalysts brings about a dramatic increase in the catalytic activities of ethylene polymerization. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)