SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED <italic style="font-style: italic">β</italic>-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION

Yan-guo Li; Miao Hong; Gui-bao Zhang; Yue-sheng Li

doi:10.1007/s10118-013-1249-0

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SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED β-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION

Special Issue: Coordination Polymerization of Olefins | Updated：2023-01-03

- SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED β-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION
- Chinese Journal of Polymer Science Vol. 31, Issue 4, Pages: 574-582(2013)
- Affiliations：
  
  State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- Author bio：
  
  **Yue-sheng Li (李悦生), E-mail: ysli@ciac.jl.cn
- Funds：
- DOI：10.1007/s10118-013-1249-0
  CLC：
- Received：29 October 2012，
  
  Revised：2012-12-20，
  
  Accepted：24 December 2012，
  
  Published：2013-04
- Accepted：
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Yan-guo Li, Miao Hong, Gui-bao Zhang, et al. SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED β-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION[J]. Chinese Journal of Polymer Science, 2013, 31(4): 574-582. DOI: 10.1007/s10118-013-1249-0.
DOI：

Yan-guo Li, Miao Hong, Gui-bao Zhang, et al. SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED β-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION[J]. Chinese Journal of Polymer Science, 2013, 31(4): 574-582. DOI: 10.1007/s10118-013-1249-0. DOI：

摘要

Abstract

The ethylene/cyclopentadiene (CPD) copolymerization behavior by using fluoro-substituted bis(

-enaminoketonato) titanium complexes [FC

NC(CH

)CHCO(CF

)]

TiCl

(

1a−1c

) has been investigated in detail. Upon utilizing MMAO as a cocatalyst

complexes

1a−1c

exhibit high catalytic activities

affording the copolymers with high molecular weight and unimodal molecular weight distribution. Compared with non-substituted complex [C

NC(CH

)CHCO(CF

)]

TiCl

(

)

complexes

1a−1c

can produce the copolymers with CPD incorporation adjusted in a wide range due to the enhancement of electrophilicity of metal center caused by introducing electron-withdrawing groups. Especially complex

bearing fluorine at the

para

-position of

-aryl moiety provides the highest CPD incorporation

which is nearly two times (18.5 mol%) higher than the non-substituted complex

(8.9 mol%) under the same conditions. The highest CPD incorporation up to 24.6 mol% can be easily achieved using this complex.

H- and

C-NMR spectra demonstrate that these fluoro-substituted complexes possess regioselective nature with exclusive 1

2-insertion fashion

and alternating ethylene-CPD sequence can be detected at high CPD incorporation.

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SYNTHESIS AND CHARACTERIZATION OF FLUORO-SUBSTITUTED β-ENAMINOKETONATO TITANIUM COMPLEXES AND THEIR CATALYTIC BEHAVIOR OF REGIOSELECTIVE ETHYLENE/CYCLOPENTADIENE COPOLYMERIZATION

DOI：10.1007/s10118-013-1249-0

摘要

Abstract

关键词

Keywords

references