Ethylene Oligomerizations by Diazene Bridged Ni(II) Catalysts Derived from Pyrazole-Scaffold-Based Binucleating Ligands with Alkyl and Aryl Pendant Arms

被引：10

作者：

Budagumpi, Srinivasa ^{[1
]}

Johnson, Renjith P. ^{[1
]}

Suh, Hongsuk ^{[2
]}

Ha, Chang-Sik ^{[1
]}

Kim, Il ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Polymer Sci & Engn, WCU Ctr Synthet Polymer Bioconjugate Hybrid Mat, Pusan 609735, South Korea

[2] Pusan Natl Univ, Chem Inst Funct Mat, Pusan 609735, South Korea

来源：

CATALYSIS LETTERS | 2011年 / 141卷 / 08期

关键词：

Binuclear; Nickel complexes; Pyrazole ligand; Oligomerization; Transition metal; COMONOMER ENCHAINMENT; COBALT(II) COMPLEXES; IRON(III) COMPLEXES; POLYMERIZATION; COCATALYSTS; THIOSEMICARBAZONES; IDENTIFICATION; NUCLEARITY; CENTERS;

D O I：

10.1007/s10562-011-0618-y

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：

The coordination and organometallic chemistry of a series of diazene (N-2)-bridged Ni(II) catalysts derived from pyrazole-scaffold-based ligands bearing alkyl and aryl pendent arms was investigated. Binucleating ligands were obtained as products of the condensation reaction between 3,5-dichloroformyl-1H-pyrazole and aliphatic/aromatic primary/secondary amines under anhydrous conditions. The Ni(II) catalysts were activated with ethyl aluminum sesquichloride (EASC) to oligomerize the ethylene mainly into C4, C6, C8, and C10 fractions with activities up to 1.2 and 0.5 x 10(6) g (mol-Ni)(-1) bar(-1) h(-1) at 30 and 50 A degrees C, respectively. All catalysts were found to be electrochemically active in the working potential range of -2 to +2 V. A change in the potential of Ni(II) was provoked by the N-4 donor bridging ligands, increasing the ethylene oligomerization activity.

引用

页码：1219 / 1227

页数：9

共 32 条

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