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在3d族过渡金属配合催化剂结构的研究中,作为活性中心的模型,引人注意的是金属和铝摩尔比1∶1和1∶2的活性体,但其摩尔比2∶1的活性体尚未见报道. 在稀土配合催化剂本质的研究中,人们也一直把注意力集中于催化剂结构,但成功地合成或分离出结晶的活性体只有两种双金属配合物.Ballard等报道的Er(η-C_5H_4R)_2(CH_3)Al(CH_3)_2使乙烯聚合有活性,我们合成出的(CF_3CO_2)HLnCl(C_2H_5)Al(C_2H_5)_2使双烯烃聚合得到高顺式聚合物. 本文利用(i-C_3H_7O)_3Ln-Et_2AlCl-Et_3Al(三元体系)和(i-C_3H_7O)_2LnCl-Et_3Al(二元体系)的可溶性,合成了摩尔比为1∶2∶3=Al∶Ln∶Cl(Ln=Gd,Dy,Er,Tm.Lu-Al活性体中1∶1∶1=Al∶Ln∶Cl)的四种新的Ln-Al-Ln结晶活性体.
In the study of the structure of the 3d family transition metal complexed catalyst, as a model of the active center, notable was the active material having the molar ratio of metal to aluminum of 1: 1 and 1: 2, but the active material having the molar ratio of 2: 1 See reports.On the rare earth catalyst with the nature of the study, people have also been focused on the catalyst structure, but the successful synthesis or separation of the crystalline active only two bimetallic complexes .Ballard et al reported Er (η- C_5H_4R) _2 (CH_3) Al (CH_3) _2 was used to polymerize diolefins with (CF_3CO_2) HLnCl (C_2H_5) Al (C_2H_5) _2. (Ln = Gd, Dy) with the molar ratio of 1: 2: 3 = Al: Ln: Cl , Er, Tm.Lu-Al actives 1: 1: 1 = Al: Ln: Cl).