Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene
| dc.contributor.author | Wehrmann, Peter | deu |
| dc.contributor.author | Mecking, Stefan | |
| dc.date.accessioned | 2011-03-24T18:13:31Z | deu |
| dc.date.issued | 2008 | deu |
| dc.description.abstract | A series of new binuclear neutral κ2-N,O-chelated Ni(II) complexes [(H2C)n{[(2,6-R2-4-yl-C6H2)-N =C(H)-(3,5-I2-2-O-C6H2)-κ2-N,O]Ni(CH3)(pyridine)}2](R = iPr, 3,5-(CF3)2C6H3; n = 0, 1) are reported. The complexes are single-component catalyst precursors for ethylene polymerization. Catalyst activities exceed those of mononuclear analogues studied substantially. With 3.4 × 105 TO h-1, high molecular weight polymer is obtained (Mw 9.2 × 105 g mol-1; Mn 2.8 × 105 g mol-1). Semicrystalline polyethylene with a low degree of branching is formed (2 to 12 branches/1000 carbon atoms; prepared at 30 to 70 °C polymerization temperature), with Tm 112 to 136 °C. Polymerization in aqueous emulsion affords polyethylene dispersions. | eng |
| dc.description.version | published | |
| dc.format.mimetype | application/pdf | deu |
| dc.identifier.citation | First publ. in: Organometallics ; 27 (2008). - S. 1399-1408 | deu |
| dc.identifier.doi | 10.1021/om700942z | |
| dc.identifier.ppn | 285108743 | deu |
| dc.identifier.uri | http://kops.uni-konstanz.de/handle/123456789/9660 | |
| dc.language.iso | eng | deu |
| dc.legacy.dateIssued | 2008 | deu |
| dc.rights | Attribution-NonCommercial-NoDerivs 2.0 Generic | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/2.0/ | |
| dc.subject.ddc | 540 | deu |
| dc.title | Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene | eng |
| dc.type | JOURNAL_ARTICLE | deu |
| dspace.entity.type | Publication | |
| kops.citation.bibtex | @article{Wehrmann2008Highl-9660,
year={2008},
doi={10.1021/om700942z},
title={Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene},
number={7},
volume={27},
issn={0276-7333},
journal={Organometallics},
pages={1399--1408},
author={Wehrmann, Peter and Mecking, Stefan}
} | |
| kops.citation.iso690 | WEHRMANN, Peter, Stefan MECKING, 2008. Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene. In: Organometallics. 2008, 27(7), pp. 1399-1408. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om700942z | deu |
| kops.citation.iso690 | WEHRMANN, Peter, Stefan MECKING, 2008. Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene. In: Organometallics. 2008, 27(7), pp. 1399-1408. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om700942z | eng |
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<dcterms:abstract xml:lang="eng">A series of new binuclear neutral κ2-N,O-chelated Ni(II) complexes [(H2C)n{[(2,6-R2-4-yl-C6H2)-N =C(H)-(3,5-I2-2-O-C6H2)-κ2-N,O]Ni(CH3)(pyridine)}2](R = iPr, 3,5-(CF3)2C6H3; n = 0, 1) are reported. The complexes are single-component catalyst precursors for ethylene polymerization. Catalyst activities exceed those of mononuclear analogues studied substantially. With 3.4 × 105 TO h-1, high molecular weight polymer is obtained (Mw 9.2 × 105 g mol-1; Mn 2.8 × 105 g mol-1). Semicrystalline polyethylene with a low degree of branching is formed (2 to 12 branches/1000 carbon atoms; prepared at 30 to 70 °C polymerization temperature), with Tm 112 to 136 °C. Polymerization in aqueous emulsion affords polyethylene dispersions.</dcterms:abstract>
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