Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands | |
Yang XJ(杨晓娟); Yang PJ(杨培菊) | |
刊名 | Journal of Molecular Catalysis A: Chemical |
2008 | |
卷号 | 296页码:9-17 |
关键词 | Nickel complexes Ethylene oligomerization Phenanthroline ligand Nitrogen ligands Methylalumoxane |
ISSN号 | 1381-1169 |
通讯作者 | 吴彪 ; Christoph Janiak |
中文摘要 | A series of nickel(II) halidecomplexes [NiCl2(L)] (1a–12a) and [NiBr2(L)] (1b–12b) bearing 2-pyrazolyl substituted 1,10-phenanthroline derivatives (L1–L12) have been synthesized and characterized by elemental analysis, IR spectroscopy and X-ray diffraction analysis (for 1a , 10b and 12b).Upon activation withmethylaluminoxane (MAO), these complexes display good catalytic activities in ethylene oligomerization (up to 3.01×105 g mol(Ni)−1 h−1 at 10 atm of ethylene for 12a with L12 = 2-(3,5-diphenylpyrazol-1-yl)-9-mesityl-1,10-phenanthroline). Complexes with bulkier aryl groups in the 9-position of the phenanthroline ring and the 3- and 5-position of the pyrazolyl ring give higher activities. This is explained with the formation of a more directional environment, a reaction channel around the nickel center which enhances the probability of insertion over dissociation after ethylene coordination to Ni. Also, bulkier aryl substituents can suppress chain-transfer reactions (typically -H elimination) and therefore increase the activity. |
学科主题 | 金属有机与超分子催化 |
收录类别 | SCI |
资助信息 | the “Bairen Jihua” project of the Chinese Academy of Sciences;the University of Freiburg |
语种 | 英语 |
WOS记录号 | WOS:000261538500002 |
公开日期 | 2012-11-09 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/1945] |
专题 | 兰州化学物理研究所_OSSO国家重点实验室 兰州化学物理研究所_ERC国家工程研究中心 |
推荐引用方式 GB/T 7714 | Yang XJ,Yang PJ. Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands[J]. Journal of Molecular Catalysis A: Chemical,2008,296:9-17. |
APA | 杨晓娟,&杨培菊.(2008).Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands.Journal of Molecular Catalysis A: Chemical,296,9-17. |
MLA | 杨晓娟,et al."Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands".Journal of Molecular Catalysis A: Chemical 296(2008):9-17. |
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