Synthesis, Structure, and 1-Hexene Polymerization Catalytic Ability of Group 5 Metal Complexes Incorporating an [OSSO]-Type Ligand

被引：26
|
作者：
Toda, Tomoyuki [1 ]
Nakata, Norio [1 ]
Matsuo, Tsukasa [2 ,3 ]
Ishii, Akihiko [1 ]
机构：
[1] Saitama Univ, Grad Sch Sci & Engn, Dept Chem, Sakura Ku, Saitama 3388570, Japan
[2] RIKEN, Adv Sci Inst, Funct Elementoorgan Chem Unit, Wako, Saitama 3510198, Japan
[3] Kinki Univ, Fac Sci & Engn, Dept Chem, Higashiosaka, Osaka 5778502, Japan
来源：
ACS CATALYSIS | 2013年 / 3卷 / 08期
关键词：
vanadium; niobium; tantalum; postmetallocene; alpha-olefin polymerization; OSSO]-type ligand; ISOSPECIFIC STYRENE POLYMERIZATION; BIS(PHENOLATO) LIGAND; OLEFIN POLYMERIZATION; TITANIUM COMPLEXES; ETHYLENE POLYMERIZATION; TETRADENTATE; GENERATION; TANTALUM; CONTAIN; BEARING;
D O I：
10.1021/cs4003996
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Group 5 metal complexes bearing an [OSSO]-type bis(phenolate) ligand have been successfully prepared by the reaction of a bis(phenol) compound 3 or its dilithio salt 6 with VO(OPr)(3), NbCl5, or TaCl5. X-ray crystallographic analyses revealed the monomeric nature of the resulting complexes, [OSSO]VO(OPr) (5), [0550]NbCl3 (7), and [OSSO]TaCl3 (8), where the metal centers adopted cis-alpha configurations of the [OSSO] tetradentate ligand. The tantalum(V) complex 8 with (Bu3Al)-Bu-i/(Ph3C)[B(C6F5)(4)]as an activator catalyzed the polymerization of 1-hexene to provide completely isotactic poly(1-hexene), with a narrow molecular weight distribution ([mmmm] > 95%, M-w, = 9100 g mol(-1), PDI = 1.6); this is the first group 5 metal catalyst for a-olefin polymerization to afford a highly isospecific polymer.
引用
收藏
页码：1764 / 1767
页数：4
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