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Salicylaldiminato Pyrrolylaldiminato Group 4 Metal Alkene Polymerization Catalysts: Combining High Activity with High Comonomer Incorporation
Author(s) -
Pennington Dale A.,
Coles Simon J.,
Hursthouse Michael B.,
Bochmann Manfred,
Lancaster Simon J.
Publication year - 2006
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200600006
Subject(s) - comonomer , catalysis , zirconium , titanium , norbornene , cyclopentene , alkene , polymer chemistry , polymerization , chemistry , metal , materials science , organic chemistry , ethylene , polymer
Summary: Treatment of Zr{3‐Bu t ‐2‐(O)C 6 H 3 CHN(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 CHN(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 .