Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene
| Type of Publication: | Journal article |
| URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-62940 |
| Author: | Wehrmann, Peter; Mecking, Stefan |
| Year of publication: | 2008 |
| Published in: | Organometallics ; 27 (2008), 7. - pp. 1399-1408. - ISSN 0276-7333. - eISSN 1520-6041 |
| DOI (citable link): | https://dx.doi.org/10.1021/om700942z |
| Summary: |
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.
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| Subject (DDC): | 540 Chemistry |
| Link to License: | Attribution-NonCommercial-NoDerivs 2.0 Generic |
| Bibliography of Konstanz: | Yes |
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WEHRMANN, Peter, Stefan MECKING, 2008. Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene. In: Organometallics. 27(7), pp. 1399-1408. ISSN 0276-7333. eISSN 1520-6041. Available under: doi: 10.1021/om700942z
@article{Wehrmann2008Highl-9660, title={Highly Active Binuclear Neutral Nickel(II) Catalysts Affording High Molecular Weight Polyethylene}, year={2008}, doi={10.1021/om700942z}, number={7}, volume={27}, issn={0276-7333}, journal={Organometallics}, pages={1399--1408}, author={Wehrmann, Peter and Mecking, Stefan} }
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