Abstract
New bis-hydrocarbyl complexes of methylene bridged ansa-metallocenes [H 2Me 2H 2) 2]ZrR 2 {R = Me (1), CH 2Ph (2), CH 2SiMe 3 (3), Ph (4)} have been prepared. They form catalytically active intermediates with borane or borate depending on solvent and Zr-R group. Specifically, [H 2C(Me 2C 5H 2) 2] Zr(CH 2Ph) 2 (2) produced an ion pair upon treatment with B(C 6F 5) 3 whereas [H 2 C(Me 2C 5H 2) 2]Zr(CH 2 SiMe 3) 2 (3) produced a zwitterionic species, identified by 1H, 13C, and 19F NMR spectroscopy. Copolymerization of ethylene and norbornene for the metallocene dichloride/MAO and bis-hydrocarbyl complex/borate systems was compared.
| Original language | English |
|---|---|
| Pages (from-to) | 3402-3411 |
| Number of pages | 10 |
| Journal | Journal of Organometallic Chemistry |
| Volume | 689 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 2004 Oct 15 |
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Keywords
- ansa-Zirconocene
- Bent metallocene
- Borane
- Borate
- Copolymerization
- Ethylene
- Ion pair
- Norbornene
- Zwitterion
ASJC Scopus subject areas
- Biochemistry
- Inorganic Chemistry
- Organic Chemistry
- Physical and Theoretical Chemistry
- Materials Chemistry
Cite this
Control of symmetry in active cationic ansa-zirconocene species : Catalyst preparation, characterization and ethylene-norbornene copolymerization. / Lee, Hyosun; Hong, Sung Don; Park, Young Whan; Jeong, Boong Goon; Nam, Dae Woo; Jung, Hye Young; Jung, Min Whan; Song, Kwang Ho.
In: Journal of Organometallic Chemistry, Vol. 689, No. 21, 15.10.2004, p. 3402-3411.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Control of symmetry in active cationic ansa-zirconocene species
T2 - Catalyst preparation, characterization and ethylene-norbornene copolymerization
AU - Lee, Hyosun
AU - Hong, Sung Don
AU - Park, Young Whan
AU - Jeong, Boong Goon
AU - Nam, Dae Woo
AU - Jung, Hye Young
AU - Jung, Min Whan
AU - Song, Kwang Ho
PY - 2004/10/15
Y1 - 2004/10/15
N2 - New bis-hydrocarbyl complexes of methylene bridged ansa-metallocenes [H 2Me 2H 2) 2]ZrR 2 {R = Me (1), CH 2Ph (2), CH 2SiMe 3 (3), Ph (4)} have been prepared. They form catalytically active intermediates with borane or borate depending on solvent and Zr-R group. Specifically, [H 2C(Me 2C 5H 2) 2] Zr(CH 2Ph) 2 (2) produced an ion pair upon treatment with B(C 6F 5) 3 whereas [H 2 C(Me 2C 5H 2) 2]Zr(CH 2 SiMe 3) 2 (3) produced a zwitterionic species, identified by 1H, 13C, and 19F NMR spectroscopy. Copolymerization of ethylene and norbornene for the metallocene dichloride/MAO and bis-hydrocarbyl complex/borate systems was compared.
AB - New bis-hydrocarbyl complexes of methylene bridged ansa-metallocenes [H 2Me 2H 2) 2]ZrR 2 {R = Me (1), CH 2Ph (2), CH 2SiMe 3 (3), Ph (4)} have been prepared. They form catalytically active intermediates with borane or borate depending on solvent and Zr-R group. Specifically, [H 2C(Me 2C 5H 2) 2] Zr(CH 2Ph) 2 (2) produced an ion pair upon treatment with B(C 6F 5) 3 whereas [H 2 C(Me 2C 5H 2) 2]Zr(CH 2 SiMe 3) 2 (3) produced a zwitterionic species, identified by 1H, 13C, and 19F NMR spectroscopy. Copolymerization of ethylene and norbornene for the metallocene dichloride/MAO and bis-hydrocarbyl complex/borate systems was compared.
KW - ansa-Zirconocene
KW - Bent metallocene
KW - Borane
KW - Borate
KW - Copolymerization
KW - Ethylene
KW - Ion pair
KW - Norbornene
KW - Zwitterion
UR - http://www.scopus.com/inward/record.url?scp=4644252368&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4644252368&partnerID=8YFLogxK
U2 - 10.1016/j.jorganchem.2004.08.013
DO - 10.1016/j.jorganchem.2004.08.013
M3 - Article
VL - 689
SP - 3402
EP - 3411
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
SN - 0022-328X
IS - 21
ER -