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Synthesis of a Novel Annulated C 1 ‐Bridged ansa ‐Metallocene System
Author(s) -
Erker Gerhard,
Psiorz Christian,
Krüger Carl,
Nolte Matthias
Publication year - 1994
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19941270834
Subject(s) - chemistry , dilithium , metallocene , fulvene , propene , homogeneous , reagent , yield (engineering) , polymer chemistry , polymerization , medicinal chemistry , organic chemistry , catalysis , polymer , ion , physics , materials science , deprotonation , metallurgy , thermodynamics
2,5‐Hexanedione ( 1 ) was converted into the bis(fulvene) 2 , which was then treated with 2 molar equiv. of ethereal meth‐yllithium to give the novel annulated C 1 ‐bridged dilithium bis(cyclopentadienide) 5 . Reagent 5 was treated with MCl 4 (M = Ti, Zr) to yield the annulated C 1 ‐bridged ansa‐metallo‐cene dichlorides 6a and 6b , respectively. The homogeneous 6a , 6b /methylalumoxane Ziegler‐type systems were employed in propene polymerization reactions.