[(2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene)Zn(μ-isopropoxido)]2 | 255713-44-1

• 英文名称: [(2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene)Zn(μ-isopropoxido)]2
• 英文别名: [(2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene)Zn(isopropoxide)]2
• CAS: 255713-44-1
• 化学式: C₆₄H₉₆N₄O₂Zn₂
• 分子量: 1084.27
• InChiKey: FJWGUYHSAMIVBJ-MNWBCHASSA-N

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：
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• 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

• 作为产物：
  描述：

  N,N′-bis(2,6-diisopropylphenyl)pentane-2,4-diimine 以 not given 为溶剂， 生成 [(2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene)Zn(μ-isopropoxido)]2
  参考文献：
  名称：

  Single-Site Catalysts for Ring-Opening Polymerization:  Synthesis of Heterotactic Poly(lactic acid) from rac-Lactide

  摘要：

  DOI：

  10.1021/ja992678o

文献信息

• Polymerization of Lactide with Zinc and Magnesium β-Diiminate Complexes:  Stereocontrol and Mechanism
  作者：Bradley M. Chamberlain、Ming Cheng、David R. Moore、Tina M. Ovitt、Emil B. Lobkovsky、Geoffrey W. Coates

  DOI：10.1021/ja003851f

  日期：2001.4.1

  alkoxides based upon a beta-diiminate ligand framework has been prepared. [(BDI-1)ZnO(i)Pr](2) [(BDI-1) = 2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene] exhibited the highest activity and stereoselectivity of the zinc complexes studied for the polymerization of rac- and meso-lactide to poly(lactic acid) (PLA). [(BDI-1)ZnO(i)()Pr](2) polymerized (S,S)-lactide to isotactic

  已经制备了一系列基于 β-二亚胺配体框架的锌 (II) 和镁 (II) 醇盐。[(BDI-1)ZnO(i)Pr](2) [(BDI-1) = 2-((2,6-二异丙基苯基)酰胺基)-4-((2,6-二异丙基苯基)亚氨基)-2-戊烯] 在研究外消旋和内消旋丙交酯聚合成聚乳酸 (PLA) 的锌配合物中表现出最高的活性和立体选择性。[(BDI-1)ZnO(i)()Pr](2) 将 (S,S)-丙交酯聚合成全同立构 PLA，没有单体差向异构化，外消旋丙交酯变成异同立构 PLA (P(r) = 0.94 at 0° C)，以及内消旋丙交酯到间规 PLA（P(r) = 0.76 在 0 摄氏度）。除了数均分子量与转化率曲线和单体与催化剂比率的线性性质外，聚合反应是活跃的，这由分离的聚合物的窄多分散性证明。β-二亚胺配体上的取代基对聚合过程产生显着影响，影响立体选择性程度和聚合速率。[(BDI-1)ZnO(i)Pr](2)
• Single-Site β-Diiminate Zinc Catalysts for the Alternating Copolymerization of CO₂ and Epoxides:  Catalyst Synthesis and Unprecedented Polymerization Activity
  作者：Ming Cheng、David R. Moore、Joseph J. Reczek、Bradley M. Chamberlain、Emil B. Lobkovsky、Geoffrey W. Coates

  DOI：10.1021/ja003850n

  日期：2001.9.1

  Synthetic routes to zinc ss -diiminate complexes are reported. The synthesis of 11 ss -diimine [(BDI)H] ligands, with varying N-aryl substituents and bridging structures, is described. These ligands are converted to (BDI)ZnX complexes (X = OAc. Et. N(SiMe3)(2), Br, Cl, OH, OMe, (OPr)-Pr-i). X-ray structural data revealed that all zinc complexes examined exist as mu -X-bridged dimers in the solid state, with the exception of the zinc ethyl and amido complexes which were monomeric. Complexes of the form (BDI)ZnOR (R = alkyl, acyl) and (BDI)ZnN(SiMe3)(2) are highly active catalysts for the alternating copolymerization of epoxides and CO2. Copolymerizations of cyclohexene oxide (CHO) and CO2 with (BDI-1)ZnX [(BDI-1) = 2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene)] and (BDI-2)ZnX [(BDI-2) = 2-((2,6-diethylphenyl)amido)-4-((2,6-diethylphenyl)imino)-2-pentene)], where X = OAc, Et, N(SiMe3)(2), Br, Cl, OH, OMe, (OPr)-Pr-i, were attempted at 50 degreesC and 100 Psi CO2. Complexes with X = OAc, N(SiMe3)(2), OMe, (OPr)-Pr-i all produced polycarbonate by the alternated insertion of CHO and CO2 with similar catalytic activities, comparable molecular weights, and narrow molecular weight distributions (MWD similar to 1.1), indicating the copolymerizations are living. Furthermore, ligand effects were shown to dramatically influence the polymerization activity as minor steric changes accelerated or terminated the polymerization activity.
• Single-Site β-Diiminate Zinc Catalysts for the Ring-Opening Polymerization of β-Butyrolactone and β-Valerolactone to Poly(3-hydroxyalkanoates)
  作者：Lee R. Rieth、David R. Moore、Emil B. Lobkovsky、Geoffrey W. Coates

  DOI：10.1021/ja020978r

  日期：2002.12.1

  Polymerization of beta-butyrolactone (BBL) and beta-valerolactone (BVL) using the zinc alkoxide initiator (BDI-1)(ZnOPr)-Pr-l [(BDI-1) = 2-((2,6-diisopropylphenyl)amido)-4-((2,6-diisopropylphenyl)imino)-2-pentene] proceeds very rapidly under mild conditions to produce poly(3-hydroxybutyrate) (PHB) and poly(3-hyd roxyvalerate) (PHV), respectively. For the monomer-to-initiator ratio 200:1, PHB number-average molecular weights (M-n) are proportional to conversion throughout the reaction and polydispersity indices (PDIs) are narrow, consistent with a living polymerization. Higher monomer-to-initiator ratios can be used to achieve high molecular weight PHB (Mn > 100 000). End-group analysis verifies that the polymerization of BBL follows a coordination-insertion mechanism, where complexes of the form (BDI-1)ZnOCH(Me)CH2CO2R are the active species. Variable temperature NMR experiments show that (BDI-1)ZnO/Pr is monomeric in benzene-d(6) solution. In contrast, (BDI-2)ZnO/Pr [(BDI-2) = 2-((2,6-diethylphenyl)amido)-4-((2,6-diethy[phenyl)imino)-2-pentene] is a poor initiator at room temperature because it prefers to form a bis-mu-isopropoxide dimer in solution. According to kinetic studies, propagation by (BDI-1)ZnO/Pr is first order in both monomer as well as (BDI-1)ZnO/Pr concentration. These results lead us to propose a monometallic active species. Several results suggest that elimination side reactions are slowly catalyzed by zinc alkoxides, leading to degradation of the polymer.