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Hydrooligomerization of Cycloolefins -a View of the Microstructure of Polynorbornene by Michael Arndt; Rüdiger Engehausen; Walter Kaminsky; Konstantin Zoumis is a Chemistry article available to read on EtoBox.
What is Hydrooligomerization of Cycloolefins -a View of the Microstructure of Polynorbornene about?
## Hydrooligomerizations of norbomene were carried out using C,, C, and C,, symmetric zirconocenes with methylaluminoxane as catalysts. The structures of the hydrodimers and -trimers were investigated and correlated to the symmetry of the metallocene. The polymerization of norbomene is shown to proceed by cis-exo insertion. The mechanisms of polymerization and stereocontrol are closely related to the ones observed in the polymerization of cY-olefins. Thus the C, symmetric metallocene features erythrodiisotactic structures, while erythrodisyndiotactic products are observed in case of the C, symmetric one. This is caused by enantiomorphic site control, while stereospecificity in the hydrooligomerization using Cp,ZrCl,/MAO is determined by chain end control mechanism.
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- Author
- Michael Arndt; Rüdiger Engehausen; Walter Kaminsky; Konstantin Zoumis
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1381-1169)
- Published
- 1995
- Language
- EN
- Field
- Chemistry (Physical Sciences)