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

  • Markus Schmid , Robert Eberhardt , Jürgen Kukral and Bernhard Rieger EMAIL logo
Published/Copyright: June 2, 2014
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Zeitschrift für Naturforschung B
From the journal Zeitschrift für Naturforschung B Volume 57 Issue 10

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
Received: 2002-6-28
Published Online: 2014-6-2
Published in Print: 2002-10-1

© 1946 – 2014: Verlag der Zeitschrift für Naturforschung

Articles in the same Issue

  1. Nitridsulfidhalogenide der leichten Lanthanide vom Typ M6N3S4X (M = La - Nd; X = Cl, Br) mit ausgeordneten Sulfid- und Halogenid-Lagen / Nitride Sulfide Halides of the Light Lanthanides with the Formula Type M6N3S4X (M = La - Nd; X = Cl, Br) with Ordered Sulfide and Halide Positions
  2. Bis(triphenylphosphoranylidene)ammonium Dicyanoaurate(I)
  3. Die neuen Oxobismutate(III) Cs6Bi4O9, K9Bi5O13 und A2Bi4O7 (A = Rb, Cs) / The New Oxobismutates(III) Cs6Bi4O9, K9Bi5O13 and A2Bi4O7 (A = Rb, Cs)
  4. [3+1]-Cyclisierungen zu Tetraboraporphyrinogenen / [3+1]-Cycloadditions with Formation of Tetraboraporphyrinogenes
  5. Mercury Cyanamide / Carbodiimide Networks: Synthesis and Crystal Structures of Hg2(NCN)Cl2 and Hg3(NCN)2Cl2
  6. Self-Assembly of Organo-Sulfur, Selenium and Tellurium Compounds via π-π-Stacking and Hydrogen Bonding Interactions
  7. DFT Calculations of the Structures of Various Isomers (cis/trans) of [(CH3)(PH3)M-NH2-CH2-C(O)-O] and [(Cl)(PH3)M-NH2-CH2-C(O)-O] Complexes with M = Ni, Pd and Pt
  8. Eine einfache Synthese von 1,3-Dihydro-1,3-diborapentafulven-Derivaten / A Convenient Synthesis of 1,3-Dihydro-1,3-diborapentafulvene Derivatives
  9. Crystal Structure and Magnetic Properties of (2,2'-Dipyridyl)-(2-acetylphenolato)copper(II) Perchlorate
  10. Synthesis, Crystal Structures and Investigations on the Thermal Properties of New CuBr(2-Ethylpyrazine) Coordination Polymers
  11. Novel Non-Symmetric Nickel-Diimine Complexes for the Homopolymerization of Ethene: Control of Branching by Catalyst Design
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  13. Polysulfonylamine, CLIX [1]. Eine Vielfalt supramolekularer Synthone in zwei Molekülkomplexen von Di(4-halogenbenzolsulfonyl)aminen mit Sauerstoffbasen / Polysulfonylamines, CLIX [1]. A Variety of Supramolecular Synthons in Two Molecular Complexes of Di(4-halobenzenesulfonyl)amines with Oxygen Bases
  14. A Simple Conversion of 2'-Benzyloxyflavanone to Pterocarpan
  15. Synthesis of Rigid Cyclopropanoid Nucleoside Analogues
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  17. Synthesis of a Dinuclear μ-(η2-Thioaldehyde)zirconocene Cation Complex
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https://doi.org/10.1515/znb-2002-1011
Keywords for this article
Non-Symmetric Diimine Ni(II) Catalysts; Branched Polyethenes; C2/C3-Copolymers

Articles in the same Issue

  1. Nitridsulfidhalogenide der leichten Lanthanide vom Typ M6N3S4X (M = La - Nd; X = Cl, Br) mit ausgeordneten Sulfid- und Halogenid-Lagen / Nitride Sulfide Halides of the Light Lanthanides with the Formula Type M6N3S4X (M = La - Nd; X = Cl, Br) with Ordered Sulfide and Halide Positions
  2. Bis(triphenylphosphoranylidene)ammonium Dicyanoaurate(I)
  3. Die neuen Oxobismutate(III) Cs6Bi4O9, K9Bi5O13 und A2Bi4O7 (A = Rb, Cs) / The New Oxobismutates(III) Cs6Bi4O9, K9Bi5O13 and A2Bi4O7 (A = Rb, Cs)
  4. [3+1]-Cyclisierungen zu Tetraboraporphyrinogenen / [3+1]-Cycloadditions with Formation of Tetraboraporphyrinogenes
  5. Mercury Cyanamide / Carbodiimide Networks: Synthesis and Crystal Structures of Hg2(NCN)Cl2 and Hg3(NCN)2Cl2
  6. Self-Assembly of Organo-Sulfur, Selenium and Tellurium Compounds via π-π-Stacking and Hydrogen Bonding Interactions
  7. DFT Calculations of the Structures of Various Isomers (cis/trans) of [(CH3)(PH3)M-NH2-CH2-C(O)-O] and [(Cl)(PH3)M-NH2-CH2-C(O)-O] Complexes with M = Ni, Pd and Pt
  8. Eine einfache Synthese von 1,3-Dihydro-1,3-diborapentafulven-Derivaten / A Convenient Synthesis of 1,3-Dihydro-1,3-diborapentafulvene Derivatives
  9. Crystal Structure and Magnetic Properties of (2,2'-Dipyridyl)-(2-acetylphenolato)copper(II) Perchlorate
  10. Synthesis, Crystal Structures and Investigations on the Thermal Properties of New CuBr(2-Ethylpyrazine) Coordination Polymers
  11. Novel Non-Symmetric Nickel-Diimine Complexes for the Homopolymerization of Ethene: Control of Branching by Catalyst Design
  12. The First 6,8-Cycloeudesmane Sesquiterpene from a Marine Organism: The Red Seaweed Laurencia microcladia from the Baia di Calenzana, Elba Island
  13. Polysulfonylamine, CLIX [1]. Eine Vielfalt supramolekularer Synthone in zwei Molekülkomplexen von Di(4-halogenbenzolsulfonyl)aminen mit Sauerstoffbasen / Polysulfonylamines, CLIX [1]. A Variety of Supramolecular Synthons in Two Molecular Complexes of Di(4-halobenzenesulfonyl)amines with Oxygen Bases
  14. A Simple Conversion of 2'-Benzyloxyflavanone to Pterocarpan
  15. Synthesis of Rigid Cyclopropanoid Nucleoside Analogues
  16. Manganese(II), Iron(II), Cobalt(II) and Nickel(II) Complexes of Methanesulfonic Acid Hydrazide. Crystal Structure of trans-Dichlorotetrakis(methanesulfonic Acid Hydrazide-N2)cobalt(II) and trans-Dichlorotetrakis(methanesulfonic Acid Hydrazide-N2)nickel(II)
  17. Synthesis of a Dinuclear μ-(η2-Thioaldehyde)zirconocene Cation Complex
  18. Crystal Structure of trans- [ReCl2(dppp)2]Cl · ½H2O (dppp = 1,3-bis(diphenylphosphino)propane)
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