Organoamido zirconium( iv ) and titanium( iv ) complexes and their catalysis towards ethylene polymerization

The reaction of PhN(Li)SiMe 3 with 2 equiv. of dimethylcyanamide with further addition of 2 equiv. of CpTiCl 3 led via Me 3 SiCl elimination to dinuclear titanium( iv ) compound 1 . The reaction of DippN(Li)SiMe 3 with 1 equiv. of dimethylcyanamide with further addition of 1 equiv. of CpTiCl 3 affor...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:RSC advances 2015-01, Vol.5 (127), p.105292-105298
Hauptverfasser: Zhou, Meisu, Yang, Qiaokun, Tong, Hongbo, Yan, Lei, Wang, Xiaoyang
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The reaction of PhN(Li)SiMe 3 with 2 equiv. of dimethylcyanamide with further addition of 2 equiv. of CpTiCl 3 led via Me 3 SiCl elimination to dinuclear titanium( iv ) compound 1 . The reaction of DippN(Li)SiMe 3 with 1 equiv. of dimethylcyanamide with further addition of 1 equiv. of CpTiCl 3 afforded centrosymmetric dimeric titanium( iv ) compound 2 and mononuclear 3 with the elimination of Me 3 SiCl. The zirconium( iv ) compound 4 was obtained by the addition reaction of PhN(Li)SiMe 3 with 2 equiv. of dimethylcyanamide and metathesis reaction with ZrCl 4 . X-ray diffraction studies of 1–4 establish the dinuclear titanium( iv ) structure in 1 , half-titanocene of 2 and 3 , and a propeller-like complex fragment of 4 . Complexes 2 and 4 show moderate or high activities in the polymerization of ethylene upon activation with methylaluminoxane (MAO).
ISSN:2046-2069
2046-2069
DOI:10.1039/C5RA20868H