A Robust Ni(II) α‑Diimine Catalyst for High Temperature Ethylene Polymerization

A Robust Ni(II) α‑Diimine Catalyst for High Temperature Ethylene Polymerization

Sterically demanding NiII α-diimine precatalysts were synthesized utilizing 2,6-bis(diphenyl­methyl)-4-methyl aniline. When activated with methylaluminoxane, the catalyst NiBr2(ArNC(Me)–C(Me)NAr) (Ar = 2,6 bis(diphenyl­methyl)-4-methylbenzene) was highly active, produced well-defined polyethylene...

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Veröffentlicht in:Journal of the American Chemical Society 2013-11, Vol.135 (44), p.16316-16319
Hauptverfasser: Rhinehart, Jennifer L, Brown, Lauren A, Long, Brian K
Format: Artikel
Sprache:eng
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Zusammenfassung:Sterically demanding NiII α-diimine precatalysts were synthesized utilizing 2,6-bis(diphenyl­methyl)-4-methyl aniline. When activated with methylaluminoxane, the catalyst NiBr2(ArNC(Me)–C(Me)NAr) (Ar = 2,6 bis(diphenyl­methyl)-4-methylbenzene) was highly active, produced well-defined polyethylene at temperatures up to 100 °C (M w/M n = 1.09–1.46), and demonstrated remarkable thermal stability at temperatures appropriate for industrially used gas-phase polymerizations (80–100 °C).
ISSN:0002-7863
1520-5126
DOI:10.1021/ja408905t