Preparation and crystal structures of the complexes (η5-C5H4CMe2η5-C13H8) MCl2 (M Zr, Hf) and their role in the catalytic formation of syndiotactic polypropylene
摘要:
The reactions Of MCl4 (M = Zr, Hf) with the dilithium salt of 2-cyclopentadienyl-2-fluorenylpropane in pentane solution give the complexes (eta-5-C5H4CMe2-eta-5-C13H8)MCl2. NMR and X-ray diffraction data show that there are eta-5-bonded fluorenyl groups in these complexes. When activated with methytalumoxane both complexes catalyse the stereospecific polymerization of propylene to syndiotactic polypropylene.
C2-symmetric bis(fluorenyl) complexes: four complex models as potential catalysts for the isospecific polymerization of propylene
作者:Helmut G. Alt、Roland Zenk
DOI:10.1016/0022-328x(95)06008-k
日期:1996.4
Four possible structures of C2-symmetric bis(fluorenyl)zirconium complexes are presented. Three bis(fluorenyl)zirconocene complexes have been prepared and tested for the polymerization of propylene and ethylene. rac / meso-Dichloro[η10-(1,2-ethanediyl)bis ( seems to be the most active polymerizationcatalysts for ethylene.
提出了C 2对称的双(芴基)锆配合物的四种可能的结构。已经制备了三种双(芴基)锆茂金属配合物并测试了丙烯和乙烯的聚合反应。外消旋/内消旋-二氯[ η 10 - (1,2-乙二基)双(似乎是乙烯最活跃的聚合催化剂。
Preparation and crystal structures of the complexes (η5-C5H4CMe2η5-C13H8) MCl2 (M Zr, Hf) and their role in the catalytic formation of syndiotactic polypropylene
作者:Abbas Razavi、Joseph Ferrara
DOI:10.1016/0022-328x(92)83400-c
日期:1992.9
The reactions Of MCl4 (M = Zr, Hf) with the dilithium salt of 2-cyclopentadienyl-2-fluorenylpropane in pentane solution give the complexes (eta-5-C5H4CMe2-eta-5-C13H8)MCl2. NMR and X-ray diffraction data show that there are eta-5-bonded fluorenyl groups in these complexes. When activated with methytalumoxane both complexes catalyse the stereospecific polymerization of propylene to syndiotactic polypropylene.