Synthesis, structure, and catalytic ethylene oligomerization of nickel complexes bearing 2-pyrazolyl substituted 1,10-phenanthroline ligands

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	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.