The reaction of [η5:C5H4–(CH2)n–C6H5]2MCl2 complexes (n=1–5; M=Zr, Hf) with EtLi
摘要:
The reaction of metallocene complexes of the type [eta(5):C5H4-(CH2)(n)-C6H5](2)MCl2 (n = 1-5; M = Zr, Hf) with EtLi gives the mono nuclear ethyl derivatives [eta(5):C5H4-(CH2)(n)-C6H5](2)M(Et)Cl and the metallacycles [eta(5):C5H4-(CH2)(n)-C6H5][eta(5):C5H4-(CH2)(n)- eta(1):C6H4]MEt. A large excess of EtLi affords the dinuclear species [eta(5):C5H4-(CH2)(n)-eta(6):C6H5](2)M2Cl2 (n = 2-5). All types of complexes can be activated with methylalumoxane (MAO) and then be used for catalytic polymerization of ethylene. (C) 2004 Elsevier B.V. All rights reserved.
The reaction of [η5:C5H4–(CH2)n–C6H5]2MCl2 complexes (n=1–5; M=Zr, Hf) with EtLi
摘要:
The reaction of metallocene complexes of the type [eta(5):C5H4-(CH2)(n)-C6H5](2)MCl2 (n = 1-5; M = Zr, Hf) with EtLi gives the mono nuclear ethyl derivatives [eta(5):C5H4-(CH2)(n)-C6H5](2)M(Et)Cl and the metallacycles [eta(5):C5H4-(CH2)(n)-C6H5][eta(5):C5H4-(CH2)(n)- eta(1):C6H4]MEt. A large excess of EtLi affords the dinuclear species [eta(5):C5H4-(CH2)(n)-eta(6):C6H5](2)M2Cl2 (n = 2-5). All types of complexes can be activated with methylalumoxane (MAO) and then be used for catalytic polymerization of ethylene. (C) 2004 Elsevier B.V. All rights reserved.
ω-Phenylalkyl-substituted zirconocene dichloride complexes as catalyst precursors for homogeneous ethylene polymerization
作者:Erik H Licht、Helmut G Alt、M.Manzurul Karim
DOI:10.1016/s0022-328x(00)00009-7
日期:2000.4
The reaction of ω-phenyl-1-bromoalkanes with cyclopentadienyl sodium, indenyl lithium or fluorenyl lithium forms ω-phenylalkyl-substituted ligand precursors in high yields. The corresponding anions react with zirconium tetrachloride to give ω-phenylalkyl-substituted zirconocene dichloride complexes. After activation with methylaluminoxane, these complexes are highly active catalysts for homogeneous