Citation: Xin-e Duan, Qi-feng Xing, Zhen-ming Dong, Jian-bin Chao, Sheng-di Bai, Dian-sheng Liu, Wen-hua Sun. Trichlorozirconium 2-Hydrazonides: Synthesis, Characterization and Their Catalytic Behavior toward Ethylene Polymerization[J]. Chinese Journal of Polymer Science, ;2016, 34(3): 390-398. doi: 10.1007/s10118-016-1768-6 shu

Trichlorozirconium 2-Hydrazonides: Synthesis, Characterization and Their Catalytic Behavior toward Ethylene Polymerization

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1. Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China
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2. School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
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3. Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, China
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School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China

Received Date: 21 November 2015
Revised Date: 21 December 2015

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 21272142 and U1362204) and the Natural Science Foundation of Shanxi Province (No. 2015011015).

The trichlorozirconium 2-hydrazonides (R=H, A; R=CH3, B) were synthesized through the finely controlled stoichiometrical reactions of anhydrous zirconium tetrachloride with the lithium salt of either 1-(furan-2-ylmethylene)-2-phenylhydrazonide or 1-(furan-2-ylethylidene)-2-phenyl hydrazonide in the solvent tetrahydrofuran (THF), respectively. These complexes were highly sensitive to air and moisture due to solely using less bulky ligand of hydrazonides. The molecular structures of the title complexes, determined by means of single crystal X-ray diffraction, were found to be the distorted pentagonal bipyramid geometry around zirconium atom, with three chlorides and the hydrazonato ligand acting as the 2-coordination mode as well as two incorporated THF molecules. Upon activation with either methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), both complexes A and B exhibited catalytic activities toward ethylene polymerization, producing polyethylenes with ultra-high molecular weights.
- Titanium complexes,
- Phenylhydrazonide,
- Ethylene polymerization,
- Ultra-high molecular weight polyethylene
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