Cycloheptyl-fused NNO-ligands as electronically modifiable supports for M(II) (M=Co, Fe) chloride precatalysts; probing performance in ethylene oligo-/polymerization | |
Department | OSSO国家重点实验室 |
Chantsalnyam Bariashir1,2; Wang, Zheng1,2; Du, Shizhen1; Gregory A. Solan1,3; Huang, Chuanbing1,2; Liang, Tongling1; Sun WH(孙文华)1,2,4; Sun WH(孙文华) | |
2017 | |
Source Publication | Journal of Polymer Science Part A: Polymer Chemistry |
ISSN | 0887-624X |
Volume | 55Issue:24Pages:3980-3989 |
Abstract | The N,N,O-cobalt(II), [2,3-{C4H8C(NAr)}:5,6-{C4H8C(O)}C5HN]CoCl2 (Ar = 2,6-(CHPh2)2-4-MeC6H2 Co1, 2,6-(CHPh2)2-4-EtC6H2 Co2, 2,6-(CHPh2)2-4-ClC6H2 Co3, 2,6-(CHPh2)2-4-FC6H2 Co4) and N,N,O-iron(II) complexes, [2,3-{C4H8C(NAr)}:5,6-{C4H8C(O)}C5HN]FeCl2 (Ar = 2,6-(CHPh2)2-4-MeC6H2 Fe1, 2,6-(CHPh2)2-4-EtC6H2 Fe2, 2,6-(CHPh2)2-4-ClC6H2 Fe3, 2,6-(CHPh2)2-4-FC6H2 Fe4), each containing one sterically enhanced but electronically modifiable N-2,6-dibenzhydryl-4-R2-phenyl group, have been prepared by a one-pot template approach using ,′-dioxo-2,3:5,6-bis(pentamethylene)pyridine, the corresponding aniline along with the respective cobalt or iron salt in acetic acid. Distorted square pyramidal geometries are a feature of the molecular structures of Co1–Co4. Upon activation with MAO or MMAO, Co1–Co4 show good activities (up to 2.2 × 105 g mol−1(Co) h−1) affording short chain oligomers (C4–C30) with good -olefin selectivity. By contrast, Fe1–Fe4, in the presence of MMAO, displayed moderate activities (up 10.9 × 104 g(PE) mol−1(Fe) h−1) for ethylene polymerization forming low-molecular-weight linear polymers (up to 13.0 kg mol−1) incorporating saturated n-propyl and i-butyl chain ends. For both cobalt and iron, the precatalysts incorporating the more electron withdrawing 4-R2-substituents [Cl (Co3/Fe3), F (Co4/Fe4)] deliver the best catalytic activities, while with cobalt, these types of substituents additionally broaden the oligomeric distribution. |
Keyword | Coordination Polymerization Α-imino-α′-oxo-2 Metal-organic Catalysts 3:5 Oligomers 6-bis(Pentamethylene)Pyridine Polyethylene |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1002/pola.28767 |
Funding Organization | the National Natural Science Foundation of China (Nos. 21374123;U1362204);CB is grateful to the CAS-TWAS president’s fellowship. GAS thanks the Chinese Academy of Sciences for a Visiting Fellowship |
Indexed By | SCI |
If | 2.952 |
Language | 英语 |
compositor | 第四作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22742 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Gregory A. Solan; Sun WH(孙文华) |
Affiliation | 1.Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2.CAS Research/Education Center for Excellence in Molecular Sciences and International School, University of Chinese Academy of Sciences, Beijing 100049, China 3.Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom 4.State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
Recommended Citation GB/T 7714 | Chantsalnyam Bariashir,Wang, Zheng,Du, Shizhen,et al. Cycloheptyl-fused NNO-ligands as electronically modifiable supports for M(II) (M=Co, Fe) chloride precatalysts; probing performance in ethylene oligo-/polymerization[J]. Journal of Polymer Science Part A: Polymer Chemistry,2017,55(24):3980-3989. |
APA | Chantsalnyam Bariashir.,Wang, Zheng.,Du, Shizhen.,Gregory A. Solan.,Huang, Chuanbing.,...&孙文华.(2017).Cycloheptyl-fused NNO-ligands as electronically modifiable supports for M(II) (M=Co, Fe) chloride precatalysts; probing performance in ethylene oligo-/polymerization.Journal of Polymer Science Part A: Polymer Chemistry,55(24),3980-3989. |
MLA | Chantsalnyam Bariashir,et al."Cycloheptyl-fused NNO-ligands as electronically modifiable supports for M(II) (M=Co, Fe) chloride precatalysts; probing performance in ethylene oligo-/polymerization".Journal of Polymer Science Part A: Polymer Chemistry 55.24(2017):3980-3989. |
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