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Synthesis and application in ethylene polymerization of p-biphenylene-bridged dinuclear zirconocenes
Deng, XB; Xu, SS; Wang, BQ; Zhou, XZ; Yang, L; Li, YF; Hu, YL
2002-11-01
Source PublicationCHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
ISSN0251-0790
Volume23Issue:11Pages:2089-2092
Abstract4,4'-Dibromobiphenyl reacted with n-BuLi to form 4,4'-dilithiobiphenyl, which further reacted with 2, 3, 4,'5-tetramethylcyclopent-2-enone following the elimination of water to give the ligand 4-(C5MC4H) C6H4-C6H4 (C5Me4H)-4 (1). Ligand 1 reacted with, n-BuLi and ZrCl4 to, form the p-biphenylene-bridged dinuclear tetramethylcyclopentadienyl zirconium trichlorides 4-(C5Me4ZrCl3) (.) C6H4-C6H4 (C5Me4ZrCl3)-4, which reacted in situ with cyclopentadienyl lithium(CpLi) or indenyl lithium (IndLi) to give the corresponding p-biphenylene-bridged; dinuclear zirconocenes 4- (C5Me4ZrCl2Cp') C6H4-C6H4 (C5Me4ZrCl2Cp')-4 [Cp' = Cp(2), Ind(3)]. The zirconocenes 2 and 3 were characterized by H-1 NMR, MS spectra and elemental analysis, and were studied for ethylene polymerization with methyl aluminoxane (MAO) as cocatalyst. Both 3 and 4 show very high activities and reach the maximum. at a higher temperature, indicating that the introduction of the p-biphenylene-bridge increased the catalytic activity and thermal stability of the dinuclear zirconocene catalysts.
KeywordMetallocene Dinuclear Zirconium Indenyl
Indexed BySCI
Language英语
WOS IDWOS:000179416200020
PublisherHIGHER EDUCATION PRESS
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79528
Collection中国科学院化学研究所
Corresponding AuthorWang, BQ
Affiliation1.Nankai Univ, Dept Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, Shanghai 200032, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Deng, XB,Xu, SS,Wang, BQ,et al. Synthesis and application in ethylene polymerization of p-biphenylene-bridged dinuclear zirconocenes[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2002,23(11):2089-2092.
APA Deng, XB.,Xu, SS.,Wang, BQ.,Zhou, XZ.,Yang, L.,...&Hu, YL.(2002).Synthesis and application in ethylene polymerization of p-biphenylene-bridged dinuclear zirconocenes.CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,23(11),2089-2092.
MLA Deng, XB,et al."Synthesis and application in ethylene polymerization of p-biphenylene-bridged dinuclear zirconocenes".CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE 23.11(2002):2089-2092.
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