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Preparation and characterization of active niobium, tantalum and tungsten metathesis catalysts

✍ Scribed by Richard Schrock; Scott Rocklage; Jeffrey Wengrovius; Gregory Rupprecht; Jere Fellmann

Publisher
Elsevier Science
Year
1980
Weight
403 KB
Volume
8
Category
Article
ISSN
0304-5102

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πŸ“œ SIMILAR VOLUMES

Effect of Cocatalysts on the Catalytic A
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## Abstract A series of pentavalent tantalum and niobium complexes with aryloxy ligands was prepared, and their catalytic behavior for the ROMP of norbornene was studied in the presence of an alkylaluminum cocatalyst. Tantalum complexes **1**–**4** showed very high activity for the ROMP of NBE in c

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Novel Highly Active Niobium Catalysts for Ring Opening Metathesis Polymerization of Norbornene
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## Abstract Ring‐opening metathesis polymerization (ROMP) of norbornene catalyzed by niobium(V) __N__,__N__‐dialkylcarbamates Nb(O~2~CNR~2~)~5~, __R__ = Et (**1**), Me (**2**) was studied in the presence of methylaluminoxane (MAO) as a cocatalyst. These novel catalytic systems resulted very active