bis(μ-isopropoxo)bis[dichloro(2-propanol)isopropoxotitanium(IV)] | 182114-80-3

• 英文名称: bis(μ-isopropoxo)bis[dichloro(2-propanol)isopropoxotitanium(IV)]
• CAS: 182114-80-3
• 化学式: C₁₈H₄₄Cl₄O₆Ti₂
• 分子量: 594.116
• InChiKey: JMFGQNVXACGNBM-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：

  异丙醇 、 chlorotitanium(IV) triisopropoxide 以 甲苯 为溶剂， 以71.4%的产率得到bis(μ-isopropoxo)bis[dichloro(2-propanol)isopropoxotitanium(IV)]
  参考文献：
  名称：

  Stepwise Reactions of TiCl₄ and Ti(OⁱPr)Cl₃ with 2-Propanol. Variable-Temperature NMR Studies and Crystal Structures of [TiCl₂(OⁱPr)(HOⁱPr)(μ-Cl)]₂ and [TiCl₂(OⁱPr)(HOⁱPr)(μ-OⁱPr)]₂

  摘要：

  The reactions of TiCl4 and Ti((OPr)-Pr-i)Cl-3 with 1-3 molar equiv of 2-propanol give the dimeric complexes [TiCl3((HOPr)-Pr-i)(mu-Cl)](2) (1), [TiCl2((OPr)-Pr-i)((HOPr)-Pr-i)(mu-Cl)](2) (2), and [TiCl2((OPr)-Pr-i)((HOPr)-Pr-i)(mu-(OPr)-Pr-i)](2) (3). The reactions are shown to proceed stepwise with the consecutive addition of 2-propanol. Complexes 2 and 3 are dynamic in solution. However, the proton VT NMR studies show that they are static and remain the dimeric features in solution at low temperatures. Two inequivalent methyl environments are observed for the 2-propanol ligand of complex 3, probably due to the intramolecular hydrogen bonding from the isopropanolic hydrogen to the chloride on the second titanium metal center. 2 crystallizes in the orthorhombic space group Pbca with cell parameters of a = 12.605(3) Angstrom, b = 12.841(4) Angstrom, c = 15.414(4) Angstrom, Z = 4, D-calcd = 1.456 g/cm(3), R = 0.049, R(w) = 0.062, and G(OF) = 1.38. 3 crystallizes in the monoclinic space group P2(1)/c with cell parameters of a = 9.457(2) Angstrom, b = 15.277(2) Angstrom, c = 11.354(4), beta = 112.76(2)degrees, Z = 2, D-calcd = 1.305 g/cm(3), R = 0.032, R(w) = 0.048, and G(OF) = 1.29. Through the analysis of the bonding features of the solid-state structures 2 and 3, the relative bonding sequence of (OPr)-O---Pr-i > Cl- > (HOPr)-Pr-i > mu-(OPr)-Pr-i > mu-Cl- is established. This bonding order is useful for the prediction of the geometries of six-coordinate titanium complexes containing those ligands with the rule ''the strong ligand prefers a position trans to the weak ligand in the complexes''. Besides, the reaction features demonstrated in this study may apply to the reaction of TiCl4 or Ti((OPr)-Pr-i)Cl-3 with diols, especially for chiral diols used as ligands in titanium complexes for various asymmetric syntheses of organic compounds.

  DOI：

  10.1021/ic960147k