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  Nickel(II) catalysed co-polymerisation of CO and ethene: Formation of polyketone vs. polyethylene - The role of co-catalysts

Beckmann, U., Eichberger, E., Rufińska, A., Sablong, R., & Kläui, W. (2011). Nickel(II) catalysed co-polymerisation of CO and ethene: Formation of polyketone vs. polyethylene - The role of co-catalysts. Journal of Catalysis, 283(2), 143-148. doi:10.1016/j.jcat.2011.08.002.

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 Creators:
Beckmann, Udo1, Author
Eichberger, Eva1, Author
Rufińska, Anna2, Author              
Sablong, Raffaël3, Author
Kläui, Wolfgang1, Author
Affiliations:
1Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl I: Bioanorganische Chemie und Katalyse, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany, ou_persistent22              
2Service Department Farès (NMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445623              
3Eindhoven University of Technology, Laboratory of Polymer Chemistry, Helix Building STO 1.35, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, ou_persistent22              

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Free keywords: Polyketone; Polyethylene; Nickel complexes; Lewis acids/bases; Co-catalysts; 13C-CP/MAS-NMR; DSC; SEC; MALDI-TOF-MS
 Abstract: The square planar Ni complex (SP-4-3)-[Ni(2-tol)(PPh3)(N,O)] (N,O = (Z)-4,4,5,5,6,6,6-heptafluoro-3-oxo-2-(pyrrolidine-2-ylidene)-hexanenitrile) is an active catalyst for the co-polymerisation of CO and ethene yielding aliphatic polyketone. Addition of Lewis acids like BPh3 or B(C6F5)3 as co-catalyst accelerates the polymerisation but not the lifetime of the catalyst and leads to a mixture of polyethylene and polyketone. Addition of the Lewis base triphenylphosphane (PPh3) completely suppresses the formation of polyethylene. The polymers formed were characterised by IR spectroscopy, 13C cross polarisation (CP) magic angle spinning (MAS) solid state NMR spectroscopy, differential scanning calorimetry (DSC) and size exclusion chromatography (SEC).

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Language(s): eng - English
 Dates: 2011-07-232011-04-012011-08-012011-09-132011-10-27
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.jcat.2011.08.002
 Degree: -

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Title: Journal of Catalysis
Source Genre: Journal
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Publ. Info: San Diego, CA. : Academic Press
Pages: 6 Volume / Issue: 283 (2) Sequence Number: - Start / End Page: 143 - 148 Identifier: ISSN: 0021-9517
CoNE: https://pure.mpg.de/cone/journals/resource/954922645027