Naphthyridine cyclopentadienyl chromium complexes as single-site catalysts for the formation of ultrahigh molecular weight polyethylene
Cyclopentadienyl ligands functionalized with a 1,5-naphthyridine donor have been used for the formation of chromium(III) half-sandwich complexes. In addition to standard analytical characterization, the complexes have been investigated by paramagnetic 1H NMR spectroscopy combined with DFT calculatio...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
October 25, 2012
|
| In: |
Organometallics
Year: 2012, Jahrgang: 31, Heft: 21, Pages: 7368-7374 |
| ISSN: | 1520-6041 |
| DOI: | 10.1021/om300582j |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1021/om300582j Verlag, Volltext: https://doi.org/10.1021/om300582j 
|
| Verfasserangaben: | David Sieb, Robert W. Baker, Hubert Wadepohl, and Markus Enders |
| Zusammenfassung: | Cyclopentadienyl ligands functionalized with a 1,5-naphthyridine donor have been used for the formation of chromium(III) half-sandwich complexes. In addition to standard analytical characterization, the complexes have been investigated by paramagnetic 1H NMR spectroscopy combined with DFT calculations. After activation, highly active single-site catalysts are obtained that lead to the formation of ultrahigh molecular weight polyethylene (UHMW-PE). Evaluation of polymer formation after different polymerization times at low temperature shows that the number of active centers is low at the beginning, but increases with polymerization time. |
|---|---|
| Beschreibung: | Gesehen am 13.08.2018 |
| Beschreibung: | Online Resource |
| ISSN: | 1520-6041 |
| DOI: | 10.1021/om300582j |