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Titanium Complexes with a Linked Amido−Cyclopentadienyl Ligand and a Bidentate Organyl Group: Synthesis, Structure, and Ethene Polymerization Activity
Author(s) -
Eberle Thomas,
Spaniol Thomas P.,
Okuda Jun
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199802)1998:2<237::aid-ejic237>3.0.co;2-p
Subject(s) - chemistry , methylaluminoxane , denticity , cyclopentadienyl complex , ligand (biochemistry) , titanium , metallocene , polymerization , intramolecular force , isopropyl , crystal structure , medicinal chemistry , stereochemistry , organometallic chemistry , derivative (finance) , crystallography , catalysis , organic chemistry , receptor , biochemistry , polymer , financial economics , economics
Titanium complexes containing a linked isopropyl‐ or benzylamido(tetramethylcyclopentadienyl) ligand C 5 Me 4 SiMe 2 NR (R = i Pr, CH 2 Ph,) and one bidentate organyl group C 6 H 4 (CH 2 NMe 2 )‐2, CH 2 C 6 H 4 (NMe 2 )‐2, and {η 5 ‐C 5 H 3 (CH 2 NMe 2 )‐2}Fe(η 5 ‐C 5 H 5 ) were prepared by salt metathesis of the corresponding dichloro complex Ti(η 5 :η 1 ‐C 5 Me 4 SiMe 2 NR)Cl 2 with the lithium organyl. Single crystal X‐ray structural analysis of Ti(η 5 :η 1 ‐C 5 Me 4 SiMe 2 NCH 2 Ph)‐ {C 6 H 4 (CH 2 NMe 2 )‐2}Cl and of Ti(η 5 :η 1 ‐C 5 Me 4 SiMe 2 N i Pr){CH 2 C 6 H 4 (NMe 2 )‐2}Cl revealed the presence of intramolecular coordination with square pyramidal geometry around titanium. In the ferrocenyl derivative Ti(η 5 :η 1 ‐C 5 Me 4 SiMe 2 NCH 2 Ph)[{η 5 ‐C 5 H 3 (CH 2 NMe 2 )‐2}Fe(η 5 ‐C 5 H 5 )]Cl the NMe 2 group is not bonded at the titanium atom. Ethene polymerization catalyzed by these complexes upon activation with methylaluminoxane was examined.