Aufgrund von Vorbereitungen auf eine neue Version von KOPS, können am Montag, 6.2. und Dienstag, 7.2. keine Publikationen eingereicht werden. (Due to preparations for a new version of KOPS, no publications can be submitted on Monday, Feb. 6 and Tuesday, Feb. 7.)
Type of Publication: | Journal article |
Publication status: | Published |
Author: | Kenyon, Philip; Falivene, Laura; Caporaso, Lucia; Mecking, Stefan |
Year of publication: | 2019 |
Published in: | ACS Catalysis ; 9 (2019), 12. - pp. 11552-11556. - eISSN 2155-5435 |
DOI (citable link): | https://dx.doi.org/10.1021/acscatal.9b04028 |
Summary: |
The influence of the labile ligand on the rate of β-hydride elimination (BHE) for salicylaldiminato Ni(II) complexes is shown using a series of precatalysts which differ only in the labile ligand but produce polyethylenes with a range of molecular weights (Mn = 466 to 100 kg mol–1), degrees of branching (1.7 to 7.3 branches/1000 C), and melting temperatures (from 132 to 123 °C) under the same conditions. The use of a weakly coordinating solvent (diethyl ether) was able to suppress this increase in BHE. DFT studies on a related salicylaldiminato Ni(II) complex show that BHE can feasibly occur following recombination of the labile ligand with the catalyst.
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Subject (DDC): | 540 Chemistry |
Keywords: | homogeneous nickel(II) catalysts, ethylene insertion polymerization, mechanism, density functional theory, polyethylene |
Bibliography of Konstanz: | Yes |
Refereed: | No |
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KENYON, Philip, Laura FALIVENE, Lucia CAPORASO, Stefan MECKING, 2019. Ancillary Ligands Impact Branching Microstructure in Late-Transition-Metal Polymerization Catalysis. In: ACS Catalysis. 9(12), pp. 11552-11556. eISSN 2155-5435. Available under: doi: 10.1021/acscatal.9b04028
@article{Kenyon2019-12-06Ancil-47759, title={Ancillary Ligands Impact Branching Microstructure in Late-Transition-Metal Polymerization Catalysis}, year={2019}, doi={10.1021/acscatal.9b04028}, number={12}, volume={9}, journal={ACS Catalysis}, pages={11552--11556}, author={Kenyon, Philip and Falivene, Laura and Caporaso, Lucia and Mecking, Stefan} }