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Designing supported alkene metathesis catalysts with high activity and stability is still a challenge, despite significant advances in the last years. Described herein is the combination of strong σ‐donating N‐heterocyclic carbene ligands with weak σ‐donating surface silanolates and cationic tungsten sites leading to highly active and stable alkene metathesis catalysts. These well‐defined silica‐supported...
Multi‐Blockcopolymere aus Norborn‐2‐en (NBE) oder cis‐Cycloocten (COE) und Ethylen, die innerhalb einer einzigen Polymerkette sowohl durch Vinylinsertionspolymerisation als auch durch Ringöffnungsmetathesepolymerisation erhaltene NBE‐ bzw. COE‐Blöcke in unterschiedlichen Anteilen enthalten, sind mit dem Katalysator 1 mit einer Diethylboryl‐geschützten Pyridyleinheit erhältlich.
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