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Novel Chiral Metallocenophanes Derived from [2.2]Paracyclophane and Their Use in Olefin Polymerization
Author(s) -
Hopf Henning,
Sankararaman Sethuraman,
Dix Ina,
Jones Peter G.,
Alt Helmut G.,
Licht Andrea
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(20021)2002:1<123::aid-ejic123>3.0.co;2-w
Subject(s) - methyllithium , chemistry , metallocene , propene , cyclopentadienyl complex , tetrahydrofuran , polymerization , butyllithium , hydride , olefin fiber , polymer chemistry , derivative (finance) , zirconium , lithium aluminium hydride , crystal structure , methylaluminoxane , medicinal chemistry , metal , catalysis , crystallography , organic chemistry , polymer , solvent , financial economics , economics
The 4‐fulvenyl[2.2]paracyclophane ( 1 ) was transformed, by treatment with lithium aluminium hydride and methyllithium in tetrahydrofuran, to the corresponding cyclopentadienyl anions 6 and 8 , respectively. The iron complex 7 was prepared from 6 , while 8 was converted into the metal complexes 9 (Fe complex), 10 (Ti), 11 (Zr), 12 (Ti), and 13 (Zr). All new metallocene complexes were characterized by their spectroscopic data. In addition, a single crystal X‐ray crystallographic analysis was performed for complex 11 . The metallacyclic zirconocene complex 15 was synthesized by the reaction of the dichloride derivative 13 with two equivalents of n ‐butyllithium. After activation of complexes 10−13 and 15 with methylalumoxane (MAO) they were used for the catalytic polymerization of ethene and propene.