pentamethylene bis(cyclopentadienylindenyl zirconium dichloride) | 199124-83-9

• 英文名称: pentamethylene bis(cyclopentadienylindenyl zirconium dichloride)
• CAS: 199124-83-9
• 化学式: C₃₃H₃₂Cl₄Zr₂
• 分子量: 752.877
• InChiKey: UTFDLOKCOOUWJK-UHFFFAOYSA-J

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  indenene zirconium trichloride 、 5-(5-Cyclopenta-2,4-dien-1-ylpentyl)cyclopenta-1,3-diene 以 not given 为溶剂， 生成 pentamethylene bis(cyclopentadienylindenyl zirconium dichloride)
  参考文献：
  名称：

  Copolymerization characteristics of homogeneous and in situ supported [(CH2)5(C5H4)2][(C9H7)ZrCl2]2 catalyst

  摘要：

  A newly synthesized catalyst, a pentamethylene bridged dinuclear zirconocene ([(CH2)(5)(C5H4)(2)][(C9H7)ZrCl2](2)), and its in situ supported catalyst were tested in a ethylene/1-hexene copolymerization and their performance was compared with those Of Cp2ZrCl2 and rac-Et(Ind)(2)ZrCl2. When homogeneous [(CH2)(5)(C5H4)][(C9H7)ZrCl2](2) catalyst was used in the copolymerization, its activity decreased with comonomer incorporation (a negative comonomer effect) and it produced copolymer with a lower comonomer content than other catalysts, both of which were ascribed to the steric effect of the [(CH2)(5)(C5H4)(2)][(C9H7)ZrCl2](2) catalyst. With in situ supported catalysts, the activity did not change much with the increase of I-hexene content in contrast to the homogeneous catalysts. In situ supported catalysts produced copolymers with higher content of 1-hexene and lower melting point and crystallinity. The changes in the molecular weight and its distribution of the copolymer with in situ supporting were significant and dependant on the nature of the catalyst. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s1381-1169(02)00516-2

文献信息

• Syntheses of polymethylene bridged dinuclear zirconocenes and investigation of their polymerisation activities
  作者：Seok Kyun Noh、Jongmun Kim、Jaehoon Jung、Choon Sup Ra、Dong-ho Lee、Hun Bong Lee、Sang Won Lee、Wan Soo Huh

  DOI：10.1016/s0022-328x(98)01085-7

  日期：1999.5

  The polymethylene bridged dinuclear zirconocenes [(CH2)(n) (C5H4)(2)][(C9H7)ZrCl2](2) (n = 3 (10), 5 (11), 7 (12), 9 (13)) have been synthesised by treating not only the respective disodium salts of the ligands with two equivalents of (C9H7)ZrCl3 in THF, but also the distannylated derivatives of the ligands with two equivalents of (C9H7)ZrCl3 in toluene. All complexes are characterised by H-1- and C-13-NMR and mass spectrometry and elemental analysis. It turned out that the values of Delta delta = [delta(d) - delta(p)], the chemical shift difference between the distal (delta(d)) and proximal (delta(p)) protons, for the produced dinuclear compounds (0.1 for 10 and 11, and 0.11 for 12 and 13) were smaller than the Delta delta values of the known polysiloxane bridged dinuclear compounds. The chemical shifts of the bridgehead carbons in these complexes are about 135 ppm shifted downfield with respect to the other two resonances at cyclopentadienyl ring (113.7 and 113.7 ppm, respectively). In order to investigate the catalytic properties of the dinuclear complexes and mononuclear metallocenes, ethylene polymerisation has been conducted in the presence of MMAO. The most important feature is that the polymethylene bridged dinuclear metallocenes represent enormously improved activities compared with the activities from the corresponding mononuclear metallocene as well as the polysiloxane bridged dinuclear zirconocenes. In addition, the influence of both the nature and length of the bridging ligand upon the reactivities of the dinuclear metallocenes has also been observed. (C) 1999 Elsevier Science S.A. All rights reserved.