Synthesis, characterization, and catalytic activities in syndiospecific polymerization of styrene for half-sandwich titanium complexes with non-Cp tridentate dianionic ligands MeN(CH(2)CR(2)O(-))(2)
New half-titanocenes, Cp*TiCl[(OCR(2)CH(2))NMe(CH(2)CR(2)' O)] [R,R ' = H (1), R,R ' = Me, H, (2), R,R ' = Me (3)], were prepared from Cp*TiCl(3) (4) with the corresponding alcohols in the presence of triethylamine. X-ray analysis shows that 1 has slightly distorted trigonal bipyramidal geometry around Ti. These complexes exhibited moderate catalytic activities for syndiospecific styrene polymerization in the presence of MAO and the activity increased in the order: 2 > 1 > 4 > 3 (at 50 degrees C), 1 > 2 > 4 > 3 (at 70 degrees C and 90 degrees C). (C) 2008 Elsevier B.V. All rights reserved.
- Publisher
- ELSEVIER SCIENCE SA
- Issue Date
- 2008-05
- Language
- English
- Article Type
- Article
- Keywords
SYNDIOTACTIC POLYSTYRENE; ETHYLENE POLYMERIZATION; OLEFIN POLYMERIZATION; MONO-CP; STEREOSPECIFIC POLYMERIZATION; CYCLOPENTADIENYL FRAGMENT; ZIRCONIUM COMPLEXES; COCATALYST SYSTEMS; CRYSTAL-STRUCTURE; ANCILLARY LIGAND
- Citation
JOURNAL OF ORGANOMETALLIC CHEMISTRY, v.693, no.10, pp.1945 - 1951
- ISSN
- 0022-328X
- Appears in Collection
- CH-Journal Papers(저널논문)
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