dichlorozirconium(2+);dimethyl-bis(2,3,4,5-tetramethylcyclopenta-2,4-dien-1-yl)germane | 259752-38-0

• 分子结构分类: 有机化合物 - 碳氢化合物 - 芳香烃
• 英文名称: dichlorozirconium(2+);dimethyl-bis(2,3,4,5-tetramethylcyclopenta-2,4-dien-1-yl)germane
• CAS: 259752-38-0
• 化学式: C₂₀H₃₀Cl₂GeZr
• 分子量: 505.178
• InChiKey: DRNARRFDCCHUFW-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  5.79
• 重原子数：
  24
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  、 氯化锆(IV) 以 四氢呋喃 为溶剂， 以38%的产率得到dichlorozirconium(2+);dimethyl-bis(2,3,4,5-tetramethylcyclopenta-2,4-dien-1-yl)germane
  参考文献：
  名称：

  Niobium, titanium, zirconium and hafnium complexes incorporating germanium bridged ansa ligands. X-Ray crystal structures of [Zr{Me2Ge(η5-C5Me4)2}Cl2] and [M{Me2Ge(η5-C5Me4)(η5-C5H4)}Cl2] (M=Zr, Hf)

  摘要：

  Both the symmetric and asymmetric ansa-ligand precursors Me2Ge(C5Me4H)(2) (1) and Me2Ge(C5Me4H)(C5H4R) (R = H (3), Me (4)) and their lithium derivatives Li-2{Me2Ge(C5Me4)(2)} (5) and Li-2{Me2Ge(C5Me4)(C5H3R)} (R = H (6), Me (7)) have been prepared. The ansa-niobocene imido complex [Nb(=NBu'){Me2Ge(eta(5)-C5Me4)(eta(5)-C5H4)}Cl] (8) was synthesized by the reaction of [Nb(=NBu')Cl-3(py)(2)] with the appropriate lithiated ansa-precursor. The Group 4 metal complexes containing germanium bridged ansa-ligands [M{Me2Ge(eta(5)-C5Me4)(2)}Cl-2] (M = Ti (9), Zr (10), Hf (11)), [M{Me2Ge(eta(5)-C5Me4)(eta(5)-C5H4)}Cl-2] (M = Ti (12), Zr (13), Hf (14)), and [M{Me2Ge(eta(5)-C5Me4)(eta(5)-C5H3Me)}Cl-2] (M = Ti (15), Zr (16), Hf (17)) were prepared by the reaction of MCl4 and the corresponding lithiated ansa-derivative. The molecular structures of 10, 13 and 14 were determined by single-crystal X-ray diffraction studies. Preliminary results for the catalytic activity of the Group 4 ansa-metallocene complexes in the polymerization of ethylene and propylene are reported. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0022-328x(02)01576-0

文献信息

• Synthesis, structures and polymerization catalytic properties of germyl-bridged bis(cyclopentadienyl) metallocenes
  作者：Shansheng Xu、Xuliang Dai、Baiquan Wang、Xiuzhong Zhou

  DOI：10.1016/s0022-328x(01)01396-1

  日期：2002.2

  The ansa-metallocene complexes Me2Ge(eta(5)-C5Me4)(2)MCl2 [M = Ti (1), Zr (2)], Me2Ge(eta(5)-C5H3Bu-t)(2)ZrCl2 (3) and Me2Ge(eta(5)-C5H4)(eta(5)-C5H3R)ZrCl2 [R = Me (4), t-Bu (5)] were prepared by the reaction of the corresponding ligands with n-BuLi and MCl4.2THF, respectively. The molecular structures of 1 and 2 have been determined by the X-ray diffraction method. Complexes 2-5 in combination with MAO were studied as catalysts for ethylene polymerization and all the germyl-bridged zirconocene catalysts show high activities at relative high temperatures. This indicates that the germyl-bridged zirconocene systems show thermally stable catalyst systems for polymerization of ethylene. (C) 2002 Elsevier Science B.V. All rights reserved.