Half-Metallocene Tantalum Complexes Bearing Methyl Methacrylate (MMA) and 1,4-Diaza-1,3-diene Ligands as MMA Polymerization Catalysts

Half-Metallocene Tantalum Complexes Bearing Methyl Methacrylate (MMA) and 1,4-Diaza-1,3-diene Ligands as MMA Polymerization Catalysts

Activation with AlMe3 at low temperature converts half‐metallocene complexes of tantalum with methyl methacrylate (MMA) and diazadiene ligands such as [Cp*Ta(η2‐Cy‐DAD)(η4‐MMA)] (structure shown) into effective catalysts for the polymerization of MMA. Polymerization is complete after 10 min at −20°C...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Angewandte Chemie International Edition 2001-03, Vol.40 (5), p.960-962
Hauptverfasser: Matsuo, Yutaka, Mashima, Kazushi, Tani, Kazuhide
Format: Artikel
Sprache:eng
Schlagworte:
diazadienes
homogeneous catalysis
metallocenes
polymerization
tantalum
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Activation with AlMe3 at low temperature converts half‐metallocene complexes of tantalum with methyl methacrylate (MMA) and diazadiene ligands such as [Cp*Ta(η2‐Cy‐DAD)(η4‐MMA)] (structure shown) into effective catalysts for the polymerization of MMA. Polymerization is complete after 10 min at −20°C and gives a poly(methyl methacrylate) of narrow polydispersity. Cp*=η5‐C5H5, Cy‐DAD=1,4‐dicyclohexyl‐1,4‐diaza‐1,3‐butadiene.
ISSN:1433-7851
1521-3773
DOI:10.1002/1521-3773(20010302)40:5<960::AID-ANIE960>3.0.CO;2-W