| 1386955-32-3

• CAS: 1386955-32-3
• 化学式: C₃₁H₆₈ClN₆O₂Si₂Yb
• 分子量: 821.584
• InChiKey: JWYSATATWUELRF-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为反应物：
  描述：

  乙二醇二甲醚 、 以 乙二醇二甲醚 为溶剂， 以82%的产率得到
  参考文献：
  名称：

  Syntheses of lanthanide monochloride and monoborohydride complexes supported by bridged bis(guanidinate) ligand and the use of borohydride complexes in polymerization of cyclic esters

  摘要：

  Reaction of LnCl(3) with bridged bis(guanidinate) lithium salt LLi2 (1) (L = iPr(Me3Si)NC(NiPr) N(CH2)(3)NC(NiPr)N(SiMe3)iPr) afforded the monochlorides LLnCl(THF)(2) (Ln = Nd (2), Yb (3), Y (4)) and LYbCl(DME) (5) (DME 1,2-dimethoxyethane). Complexes 2-5 were structurally characterized. Treatment of the chlorides with NaBH4 gave the monoborohydride complexes LLnBH(4)(DME) (Ln = Nd (6), Yb (7), Y (8)). X-ray crystal structure analyses of 6-8 revealed each complex was monomer with the central metal ligated by one L, one eta(3)-BH4 group and one DME. Complexes 6-8 initiate ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL), L-lactide (L-LA) and rac-lactide (rac-LA) as single-site initiators. The highest activity and the best molecular mass control for all the three monomers were found for the Nd system 6. The ROP of epsilon-CL in toluene with 6 gave the polymers with the (M) over bar (n exp) in good agreement with the (M) over bar (n theo) ((M) over bar (n) = the number averaged molar mass) at the molar ratio of monomer to 6 up to 600 and moderate molar mass distributions ((M) over bar (w)/(M) over bar (n) 1.43-1.52) ((M) over bar (w) the weight averaged molar mass). The ROP of L-LA with 6 in THF afforded the polymers with controlled molar mass and relatively narrow (M) over bar (w)/(M) over bar (n). Complexes 6-8 are active in the ROP of rac-LA affording poly(LA) with a slight heterotactic bias (Pr = 0.62-0.72). (C) 2012 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2012.05.011
• 作为产物：
  描述：

  四氢呋喃 、 氯化镱(III) 、 以 四氢呋喃 为溶剂， 以80%的产率得到
  参考文献：
  名称：

  Syntheses of lanthanide monochloride and monoborohydride complexes supported by bridged bis(guanidinate) ligand and the use of borohydride complexes in polymerization of cyclic esters

  摘要：

  Reaction of LnCl(3) with bridged bis(guanidinate) lithium salt LLi2 (1) (L = iPr(Me3Si)NC(NiPr) N(CH2)(3)NC(NiPr)N(SiMe3)iPr) afforded the monochlorides LLnCl(THF)(2) (Ln = Nd (2), Yb (3), Y (4)) and LYbCl(DME) (5) (DME 1,2-dimethoxyethane). Complexes 2-5 were structurally characterized. Treatment of the chlorides with NaBH4 gave the monoborohydride complexes LLnBH(4)(DME) (Ln = Nd (6), Yb (7), Y (8)). X-ray crystal structure analyses of 6-8 revealed each complex was monomer with the central metal ligated by one L, one eta(3)-BH4 group and one DME. Complexes 6-8 initiate ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL), L-lactide (L-LA) and rac-lactide (rac-LA) as single-site initiators. The highest activity and the best molecular mass control for all the three monomers were found for the Nd system 6. The ROP of epsilon-CL in toluene with 6 gave the polymers with the (M) over bar (n exp) in good agreement with the (M) over bar (n theo) ((M) over bar (n) = the number averaged molar mass) at the molar ratio of monomer to 6 up to 600 and moderate molar mass distributions ((M) over bar (w)/(M) over bar (n) 1.43-1.52) ((M) over bar (w) the weight averaged molar mass). The ROP of L-LA with 6 in THF afforded the polymers with controlled molar mass and relatively narrow (M) over bar (w)/(M) over bar (n). Complexes 6-8 are active in the ROP of rac-LA affording poly(LA) with a slight heterotactic bias (Pr = 0.62-0.72). (C) 2012 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jorganchem.2012.05.011