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Synthesis, structure and ethylene polymerization of group 4 complexes with phosphinoamide ligands
Author(s) -
Qi Changhe,
Zhang Suobo,
Sun Jinghun
Publication year - 2006
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1029
Subject(s) - chemistry , methylaluminoxane , ethylene , ether , crystallography , medicinal chemistry , polymerization , solid state , crystal structure , stereochemistry , catalysis , lithium (medication) , metallocene , organic chemistry , medicine , endocrinology , polymer
Group 4 complexes containing diphosphinoamide ligands [Ph 2 PNR] 2 MCl 2 (3: R = t Bu, M = Ti; 4: R = t Bu, M = Zr; 5: R = Ph, M = Ti; 6: R = Ph, M = Zr) were prepared by the reaction of MCl 4 (M = Ti; Zr) with the corresponding lithium phosphinoamides in ether or THF. The structure of [Ph 2 PN t Bu] 2 TiCl 2 (3) was determined by X‐ray crystallography. The phosphinoamides functioned as η 2 ‐coordination ligands in the solid state and the TiN bond length suggests it is a simple single bond. In the presence of modified methylaluminoxane or i ‐Bu 3 Al/Ph 3 BC(C 6 F 5 ) 4 , catalytic activity of up to 59.5 kg PE/mol cat h bar was observed. Copyright © 2005 John Wiley & Sons, Ltd.