Living Polymerization of Ethylene Catalyzed by Diene Complexes of Niobium and Tantalum, M(.eta.5-C5Me5)(.eta.4-diene)X2 and M(.eta.5-C5Me5)(.eta.4-diene)2 (M = Nb and Ta), in the Presence of Methylaluminoxane
Living Polymerization of Ethylene Catalyzed by Diene Complexes of Niobium and Tantalum, M(.eta.5-C5Me5)(.eta.4-diene)X2 and M(.eta.5-C5Me5)(.eta.4-diene)2 (M = Nb and Ta), in the Presence of Methylaluminoxane
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铌钽二烯配合物M(eta.5-C5Me5)(eta.4-diene)X2和M(eta.5-C5Me5)(eta.4-diene)2催化乙烯活性聚合
DOI：
10.1021/om00006a008
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发表时间：
1995
期刊：
影响因子：
2.8
通讯作者：
A. Nakamura
中科院分区：
文献类型：
--
作者：
K. Mashima;Shinjiro Fujikawa;Yoshiyuki Tanaka;H. Urata;T. Oshiki;E. Tanaka;A. Nakamura
α-烯烃聚合是最重要的工业过程之一。4族茂金属和甲基铝氧烷(MAO)催化剂体系因其过程均匀、控制聚合规整度能力强而受到人们的广泛关注。1~4大阪大学工程科学系的最新进展*大阪大学理学院。(1)评论：(A)Sinn，H.；Kaminsky，W.Adv.Organomet.化学。1980，18，99.(B)皮诺，P.Angew。Int.Chem.，Int.艾德恩格尔1980，19,857.(C)Quirk，RP，Ed.过渡金属催化聚合；Ziegler-Natta和复分解聚合；剑桥大学出版社，1988年。(D)Kaminsky，W.；Steiger，R.多面体，1988，7,2375。滑石化学证明阳离子14电子基团4茂金属化合物在没有MAO辅助催化剂的情况下是催化活性物种。此外，还发现等电子中性基团3或稀土茂金属氢化物或烷基是催化烯烃聚合的催化剂。另一方面，基于5族茂金属/MAO的催化剂体系，如TaCl2Cp2和NBCLA-
Polymerization of-olefins is one of the most impor-tant industrial processes. The catalyst system of group 4 metallocenes and methylaluminoxane (MAO) has been actively investigated in view of its homogeneous process and high ability to control thestereoregularity of polymerization. 1~ 4 Recent developments of organome-f Faculty of Engineering Science, Osaka University.* Faculty of Science, Osaka University. § Mitsubishi Chemical Co. 111993-1994, Coordination Chemistry Laboratories, Institute for Molecular Science, Okazaki 444, Japan.* Abstract publishedin Advance ACS Abstracts, April 15, 1995.(1) Reviews:(a) Sinn, H.; Kaminsky, W. Adv. Organomet. Chem. 1980, 18, 99.(b) Pino, P. Angew. Chem., Int. Ed. Engl. 1980, 19, 857.(c) Quirk, RP, Ed. Transition Metal Catalyzed Polymerizations; Ziegler-Natta and Metathesis Polymerizations; Cambridge University Press: Cambridge, 1988.(d) Kaminsky, W.; Steiger, R. Polyhedron 1988, 7, 2375. tallic chemistry proved cationic 14-electron group 4 metallocenes to be catalytically active species without the cocatalyst MAO. 5’6 Moreover, isoelectronic neutral group 3 or lanthanide metallocene hydrides or alkyls have been found to be catalysts for olefin polymeriza-tion. 7’8 On the other hand, the catalyst system based on group 5 metallocene/MAO, eg, TaCl2Cp2 and NbCla-