Vanadium(<scp>v</scp>) tetra-phenolate complexes: synthesis, structural studies and ethylene homo-(co-)polymerization capability
作者:Carl Redshaw、Mark J. Walton、Mark R. J. Elsegood、Timothy J. Prior、Kenji Michiue
DOI:10.1039/c5ra20177b
日期:——
[VO(nPrO)3] and 2-(α-(2-hydroxy-3,5-di-tert-butylphenyl)benzyl)-4,6-di-tert-butylphenol (L3H2). The crystal structures of 1·2THF, 2·2MeCN, 3, 4·CH2Cl2, 5·CH2Cl2, 6·4toluene·THF, 7 and 8 have been determined. Complexes 1–3 and 5–8 have been screened as pre-catalysts for the polymerization of ethylene in the presence of a variety of co-catalysts (with and without a re-activator), including DMAC (dimethylaluminium
α,α,α',α'-四(3,5-二叔丁基-2-羟基苯基)-对二甲苯(p - L 1 H 4)与两个当量的[VO(OR)3处理后,在回流的甲苯中得到](R = n Pr,t Bu),得到配合物[VO(O n Pr)(THF)] 2(μ- p - L 1)}·2(THF)(1 ·2(THF))或[VO(O t Bu)] 2(μ- p - L 1)}·2MeCN(2·2MeCN),分别以中等至良好的产量。类似的反应用的元前配体,即α,α,α',α'-四(3,5-二-叔丁基-2-羟基苯基) -米二甲苯(米-大号2 ħ 4),得到络合物[VO(O n Pr)(THF)] 2(μ- p - L 2)}(3)。使用[V(N p -R 1 C 6 H 4)(t BuO)3 ](R 1 = Me,CF 3)和p - L1 H 4导致氧代-亚氨基配合物的分离[VO(tBuO)] [V(Np-R 1 C