Salicylaldiminato Pyrrolylaldiminato Group 4 Metal Alkene Polymerization Catalysts: Combining High Activity with High Comonomer Incorporation

✍ Scribed by Dale A. Pennington; Simon J. Coles; Michael B. Hursthouse; Manfred Bochmann; Simon J. Lancaster

• Book ID: 102491582
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 187 KB
• Volume: 27
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200600006

✦ Synopsis

Abstract

Summary: Treatment of Zr{3‐Bu^t^‐2‐(O)C~6~H~3~CHN(C~6~F~5~)}Cl~3~(THF) with K[2‐(C~6~H~5~NCH)C~4~H~3~N] yields Zr{3‐Bu^t^‐2‐(O)C~6~H~3~CHN(C~6~F~5~)}{2‐(C~6~H~5~NCH)C~4~H~3~N}Cl~2~, the first example of a (salicylaldiminato)(pyrrolylaldiminato)zirconium complex. The catalytic behavior of both the new zirconium pre‐catalyst and its titanium analogue have been determined. The titanium system is the more effective catalyst for both ethene homopolymerization and copolymerizations with hex‐1‐ene, norbornene, and cyclopentene. The titanium catalyst combines the high productivities of the bis(salicylaldiminato) parent complex with the more favorable comonomer incorporation of the bis(pyrrolylaldiminato) series.

Copolymerizations with pre‐catalysts 1 and 2.

magnified imageCopolymerizations with pre‐catalysts 1 and 2.