The surprisingly beneficial effect of soft donors on the performance of early transition metal olefin polymerisation catalysts.

Group 4 metal complexes containing phenoxy-amide ligands bearing soft pendant donors are shown to give more highly active ethylene polymerisation catalysts than counterparts containing hard donors or systems without a pendant donor.

[1]  Jie Sun,et al.  Synthesis and Characterization of Novel Tridentate [NOP] Titanium Complexes and Their Application to Copolymerization and Polymerization of Ethylene , 2004 .

[2]  V. C. Gibson,et al.  Advances in non-metallocene olefin polymerization catalysis. , 2003, Chemical reviews.

[3]  I. Goldberg,et al.  [ONXO]-Type Amine Bis(phenolate) Zirconium and Hafnium Complexes as Extremely Active 1-Hexene Polymerization Catalysts , 2002 .

[4]  A G Orpen,et al.  Nickel Ethylene Polymerization Catalysts Based on Phosphorus Ligands , 2001 .

[5]  G. Erker,et al.  Generation of homogeneous (sp(3)-C(1))-bridged Cp/amido and Cp/phosphido group 4 metal Ziegler-Natta catalyst systems. , 2001, Journal of the American Chemical Society.

[6]  Z. Goldschmidt,et al.  Zirconium Complexes of Amine−Bis(phenolate) Ligands as Catalysts for 1-Hexene Polymerization: Peripheral Structural Parameters Strongly Affect Reactivity , 2001 .

[7]  M. Kol,et al.  Isospecific Living Polymerization of 1-Hexene by a Readily Available Nonmetallocene C2-Symmetrical Zirconium Catalyst , 2000 .

[8]  E. Hey‐Hawkins,et al.  Formation of elastomeric polypropylene promoted by the dynamic complexes [TiCl2{N(PPh2)2}2] and [Zr(NPhPPh2)4] , 2000 .

[9]  G. Britovsek,et al.  The Search for New-Generation Olefin Polymerization Catalysts: Life beyond Metallocenes. , 1999, Angewandte Chemie.

[10]  R. Grubbs,et al.  Neutral Nickel(II)-Based Catalysts for Ethylene Polymerization , 1998 .

[11]  J. Scholz,et al.  Benzylverbindungen elektronenarmer Übergangsmetalle. Molekülstrukturen von Cp2Ti(CH2Ph)2 und CpZr(CH2Ph)3 , 1993 .