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Oligo or poly? A mechanistic interpretation of a switchable catalyst

Labinger, Jay and Bercaw, John and Despagnet-Ayoub, Emmanuelle (2016) Oligo or poly? A mechanistic interpretation of a switchable catalyst. In: 251st American Chemical Society National Meeting & Exposition, March 13-17, 2016, San Diego, CA.

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It is not uncommon to find catalytic systems for which changes in the ligand environment - even apparently quite minor ones - bring about a complete switchover between olefin oligomerization and polymn., but explanations of such effects on a detailed structural and mechanistic level are not so common. We have found that activation of the dibenzylzirconium complex 1 by abstraction of a benzyl group in the absence or presence of an addnl. ligand L can generate a catalyst for oligomerization or polymn. of 1-hexene, or neither, depending on the mode of activation and the nature of L. From structural characterization of intermediates by NMR and X-ray crystallog. along with end-group anal. of oligomers and polymers, we can construct a mechanistic model that satisfactorily accounts for the variety of obsd. behaviors.

Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription Website
Labinger, Jay0000-0002-1942-9232
Despagnet-Ayoub, Emmanuelle0000-0002-9013-7574
Additional Information:© 2016 American Chemical Society.
Record Number:CaltechAUTHORS:20160404-131859602
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65896
Deposited By: Tony Diaz
Deposited On:05 Apr 2016 16:46
Last Modified:03 Oct 2019 09:51

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