Jump to ContentJump to Main Navigation
Show Summary Details
More options …

Zeitschrift für Naturforschung B

A Journal of Chemical Sciences


IMPACT FACTOR 2018: 0.961

CiteScore 2018: 0.91

SCImago Journal Rank (SJR) 2018: 0.263
Source Normalized Impact per Paper (SNIP) 2018: 0.505

Online
ISSN
1865-7117
See all formats and pricing
More options …
Volume 57, Issue 10

Issues

Novel Non-Symmetric Nickel-Diimine Complexes for the Homopolymerization of Ethene: Control of Branching by Catalyst Design

Markus Schmid / Robert Eberhardt / Jürgen Kukral / Bernhard Rieger
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znb-2002-1011

Non-symmetric diimine ligands (Ar-N=C(CH3)-(CH3)C=NAr*; Ar: 2,6-diisopropyl-phenyl; Ar*: 2,6-di(4-tert-butyl-phenyl)phenyl (4b), 2,6-di(4-OCH3)-phenyl)phenyl (4c)) were synthesized and converted in-situ into the corresponding nickel dibromo complexes (5b, c) by reaction with (DME)NiBr2. The complexes were activated for ethene polymerization by treatment with MAOat ambient temperature. The resulting highmolecular weight polymer products (MW > 4.0 x 106 g mol-1) have a branched microstructure (predominantly methyl groups), as indicated by 13C NMR spectroscopy. The degree of branching can be controlled by a proper choice of the 2,6-diphenyl modified aniline moieties resulting in melting transitions ranging from 92 - 130 °C.

Keywords : Non-Symmetric Diimine Ni(II) Catalysts; Branched Polyethenes; C2/C3-Copolymers

About the article

Received: 2002-06-28

Published Online: 2014-06-02

Published in Print: 2002-10-01


Citation Information: Zeitschrift für Naturforschung B, Volume 57, Issue 10, Pages 1141–1146, ISSN (Online) 1865-7117, ISSN (Print) 0932-0776, DOI: https://doi.org/10.1515/znb-2002-1011.

Export Citation

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung.

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

[1]
Vera Rosar, Tiziano Montini, Gabriele Balducci, Ennio Zangrando, Paolo Fornasiero, and Barbara Milani
ChemCatChem, 2017, Volume 9, Number 17, Page 3402
[2]
Guoliang Mao, Yue Jiang, Ning Li, Qin Wang, Dejin Zheng, Meijiao Li, and Yingnan Ning
Chinese Science Bulletin, 2014, Volume 59, Number 21, Page 2505
[3]
Dirk Schmid, Denis Bubrin, Daniela Förster, Martin Nieger, Eric Roeben, Sabine Strobel, and Dietrich Gudat
Comptes Rendus Chimie, 2010, Volume 13, Number 8-9, Page 998
[5]
Manseong Jeon and Sang Youl Kim
Polymer Journal, 2008, Volume 40, Number 5, Page 409
[6]
Britta N Boden, Amir Abdolmaleki, Cecily T.-Z Ma, and Mark J MacLachlan
Canadian Journal of Chemistry, 2008, Volume 86, Number 1, Page 50
[7]
Yaofeng Chen, Brycelyn M. Boardman, Guang Wu, and Guillermo C. Bazan
Journal of Organometallic Chemistry, 2007, Volume 692, Number 21, Page 4745
[8]
Claudia Hamacher, Natascha Hurkes, André Kaiser, and Axel Klein
Zeitschrift für anorganische und allgemeine Chemie, 2007, Volume 633, Number 15, Page 2711
[9]
Dieter Meinhard and Bernhard Rieger
Chemistry – An Asian Journal, 2007, Volume 2, Number 3, Page 386

Comments (0)

Please log in or register to comment.
Log in