Cationic η3-benzyl nickel compounds with diphosphine ligands as catalyst precursors for ethylene oligomerization/polymerization:: influence of the diphosphine bite angle
Cationic η3-benzyl nickel compounds with diphosphine ligands as catalyst precursors for ethylene oligomerization/polymerization:: influence of the diphosphine bite angle
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DOI：
10.1016/j.jorganchem.2003.12.007
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发表时间：
2004-02-16
影响因子：
2.3
通讯作者：
Passaglia, E
中科院分区：
文献类型：
--
作者：
Albers, I;Alvarez, E;Passaglia, E
研究了ETA(3)-苄基阳离子配合物[Ni(ETA(3)-CH2C6H4-p-CF3)(P-P)](+)BPh4-(P-P=(Pr2P)-Pr-I(CH2)(N)(PPr2)-Pr-I，n=1-3)催化乙烯齐聚和聚合反应。这些单组分催化剂的活性取决于双膦配体的(CH2)(N)桥的长度。因此，dippm衍生物(n=1)表现出比dippe(n=2)或dippp(n=3)配体的化合物更高的活性。产物的相对分子质量也是n的函数，并按DIPPIN>；DIPPE；DIPPP的顺序变化，前两种催化剂产生低相对分子质量的聚乙烯，而后者产生低聚物。(C)2003爱思唯尔B.V.保留所有权利。
The oligomerization and/or polymerization of ethylene catalyzed by the cationic eta(3)-benzylcomplexes [Ni(eta(3)-CH2C6H4-p-CF3)(P-P)](+) BPh4- (P-P = (Pr2P)-Pr-i(CH2)(n)(PPr2)-Pr-i, n = 1-3) have been studied. The activity of these single component catalysts depends on the length of the (CH2)(n) bridge of the diphosphine ligand. Thus, the dippm derivative (n = 1) displays higher activity than compounds of the dippe (n = 2) or dippp (n = 3) ligands. The molecular weight of the products is also a function of n, and varies in the order dippin > dippe > dippp, with the former two catalysts giving rise to low molecular weight polyethylenes and the latter to oligomers. (C) 2003 Elsevier B.V. All rights reserved.