0000000000408523
AUTHOR
Xiang Hao
showing 8 related works from this author
Dinuclear chloroneodymium quinolinylcarboxylates: The molecular structures affected by water and the catalytic behavior toward isoprene polymerization
2016
Abstract A series of dinuclear chloroneodymium quinolinylcarboxylate compounds was synthesized and characterized. The nature and importance of metal-organic aggregations have been considered as an important factor regarding the molecular structure and catalytic performance. The neodymium center in all the title compounds exhibits the coordination numbers of 8. Cage aggregation was observed in the solid state, and the cyclic arrangement was achieved when water molecules were incorporated into the structure. Upon the activation with Al(i-Bu)3, all the title neodymium compounds form the efficient catalysts for isoprene polymerization. The catalytic activities are not strongly affected by the m…
Achieving branched polyethylene waxes by aryliminocycloocta[b]pyridylnickel precatalysts: Synthesis, characterization, and ethylene polymerization
2017
Cycloocta[b]pyridin-10-one was prepared to form the corresponding imino derivatives, which then reacted with (DME)NiBr2 to form 10-aryliminocycloocta[b]pyridylnickel bromides (Ni1–Ni5). The new compounds were characterized by means of FT-IR spectroscopy as well as elemental analysis and the organic ligands were also analyzed by the NMR measurements. Furthermore, the molecular structure of a representative complex Ni3 was determined by the single crystal X-ray diffraction, indicating the distorted tetrahedral geometry around the nickel atom. Upon the activation with either methylaluminoxane (MAO) or diethylaluminium chloride (Et2AlCl), the title nickel complexes exhibited high activity in et…
2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel chlorides: Synthesis, characterization and ethylene oligomerization
2017
Abstract 2-Chloro/phenyl-7-arylimino-6,6-dimethylcyclopenta[b]pyridylnickel chlorides (Ni1–Ni8) were synthesized from the respective ligands L1–L8 and characterized. Upon activation with either methylaluminoxane (MAO) or ethylaluminium sesquichloride (EASC), they show high catalytic activity of up to 10.84 × 106 g(oligomer) mol− 1(Ni) h− 1 in ethylene oligomerization. The products range from butenes to dodecenes for Ni1–Ni4, but are limited to butenes and hexenes in the case of Ni5–Ni8. DFT calculations indicate that the Ni C bond length in the model alkyl complexes depends both on the nature of the substituents at the heterocycles and the kind of the alkyl group, shedding some light on the…
CCDC 1554541: Experimental Crystal Structure Determination
2018
Related Article: Hongyi Suo, Youfu Zhang, Zhifeng Ma, Wenhong Yang, Zygmunt Flisak, Xiang Hao, Xinquan Hu, Wen-Hua Sun|2017|Catalysis Communications|102|26|doi:10.1016/j.catcom.2017.08.021
CCDC 1542647: Experimental Crystal Structure Determination
2017
Related Article: Randi Zhang, Zheng Wang, Zygmunt Flisak, Xiang Hao, Qingbin Liu, Wen-Hua Sun|2017|J.Polym.Sci.,Part A:Polym.Chem.|55|2601|doi:10.1002/pola.28653
CCDC 1486040: Experimental Crystal Structure Determination
2016
Related Article: Wenjuan Zhang, Lin Qian, Lixia He, Yongqiang Qian, Jiye Wang, Zhonghua Wang, Qingju Lin, Xiang Hao, Zygmunt Flisak, Wen-Hua Sun|2016|Inorg.Chim.Acta|453|589|doi:10.1016/j.ica.2016.09.030
CCDC 1486038: Experimental Crystal Structure Determination
2016
Related Article: Wenjuan Zhang, Lin Qian, Lixia He, Yongqiang Qian, Jiye Wang, Zhonghua Wang, Qingju Lin, Xiang Hao, Zygmunt Flisak, Wen-Hua Sun|2016|Inorg.Chim.Acta|453|589|doi:10.1016/j.ica.2016.09.030
CCDC 1486039: Experimental Crystal Structure Determination
2016
Related Article: Wenjuan Zhang, Lin Qian, Lixia He, Yongqiang Qian, Jiye Wang, Zhonghua Wang, Qingju Lin, Xiang Hao, Zygmunt Flisak, Wen-Hua Sun|2016|Inorg.Chim.Acta|453|589|doi:10.1016/j.ica.2016.09.030