915782-00-2Relevant academic research and scientific papers
Metallocene complex as well as preparation and application thereof
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Paragraph 0096; 0097; 0098; 0099, (2019/06/10)
The invention relates to the technical field of metallocene compounds and in particular relates to a metallocene complex as well as preparation and application thereof. The bond length between a metallocene ring of the metallocene complex provided by the
New o-methoxyphenylcyclopentadienylchromium (III) complexes: Synthesis, structures and catalytic properties for ethylene polymerization
Xu, Jiansheng,Gao, Wei,Zhang, Yuetao,Li, Jincai,Mu, Ying
, p. 1505 - 1510 (2007/10/03)
Two new ligands 1-(2-methoxyphenyl)-3,4-diphenylcyclopentadiene (1) and 1-(2-methoxyphenyl)-2,3,4,5-tetramethylcyclopentadiene (2), as well as their corresponding cyclopentadienylchromium complexes η5-1-(2-methoxyphenyl)-3,4-diphenylcyclopentadienyl chromium dichloride (3) and η5-1-(2-methoxyphenyl)-2,3,4,5-tetramethylcyclopentadienyl chromium dichloride (4) were synthesized and characterized. Molecular structures of 3 and 4 were determined by single-crystal X-ray diffraction. Complexes 3 and 4 were tested as catalyst precursors for ethylene polymerization. When activated with Al(iBu)3 and Ph3 C+ B (C6 F5)4-, complex 3 shows reasonable catalytic activity while 4 exhibits high catalytic activity for ethylene polymerization. The effects of temperature and Al/Cr ratio on the catalytic activity were studied. The molecular weight and melting temperature of the produced polyethylenes were determined.
