dichlorobis(3-hydroxy-2-methyl-4-pyrone)zirconium(IV) | 673496-30-5

• 英文名称: dichlorobis(3-hydroxy-2-methyl-4-pyrone)zirconium(IV)
• 英文别名: dichlorobis(3-oxy-2-methyl-4-pyrone)zirconium(IV)
• CAS: 673496-30-5
• 化学式: C₁₂H₁₀Cl₂O₆Zr
• 分子量: 412.338
• InChiKey: VOXPKIKTTOYVKJ-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：

  麦芽醇 、 氯化锆(IV) 以 四氢呋喃 为溶剂， 以82%的产率得到dichlorobis(3-hydroxy-2-methyl-4-pyrone)zirconium(IV)
  参考文献：
  名称：

  Zirconium alkoxide complexes as catalysts for ethylene polymerization

  摘要：

  The complexation of 2-hydroxy-1,4-naphtho-quinone and 3-hydroxy-2-methyl-4-pyrone with zirconium tetrachloride yielded complexes containing bidentate alkoxide ligands. In the presence of MAO or TIBA these complexes were found to be active for ethylene polymerization, producing polymers with high molecular weight. Both catalytic systems were also shown to be active when supported on silica or on MAO-modified silica. (C) 2003 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/s1381-1169(03)00540-5

文献信息

• Reactivity of zirconium and titanium alkoxides bidentade complexes on ethylene polymerization
  作者：Nara R. de S. Basso、Paula P. Greco、Carlos L.P. Carone、Paolo R. Livotto、Lílian M.T. Simplício、Zênis N. da Rocha、Griselda B. Galland、João H.Z. dos Santos

  DOI：10.1016/j.molcata.2006.11.027

  日期：2007.4

  The catalyst activity of zirconium and titanium complexes bearing bidentade ligands was evaluated in ethylene polymerization at different experimental conditions with methylaluminoxane (MAO) as the cocatalyst. The best activity was achieved for dichlorobis(3-hydroxy-2-methyl-4-pyrone)zirconium(IV) at Al/Zr = 2500 at 60 degrees C. Conversely, dichlorobis(3-hydroxy-2-methyl-4-pyrone)titanium(IV) exhibited a higher catalyst activity at lower Al/Ti ratio and temperature. According to H-1 NMR analysis, two stereoisomers are present for the zirconium complex. Electrochemical analyses evidenced a higher stability in the reduction of Zr(IV) in comparison to the analogous Ti(IV) complex. The cyclic voltammogram of the Ti complex in the presence of MAO and ethylene shows a potential shift to lower values, suggesting the formation of the Ti cationic species, which might be stabilized by ClMAO(-). For the Zr complex in the presence of MAO, stabilization of the active species takes place only in the presence of an ethylene atmosphere. (C) 2006 Elsevier B.V. All rights reserved.