[(bis-[2-(3,5-dimethyl-1-pyrazolyl)ethyl]amine)AlMe2(OC(2,4,6-Me3Ph)=CH2)] | 919987-21-6

• 英文名称: [(bis-[2-(3,5-dimethyl-1-pyrazolyl)ethyl]amine)AlMe2(OC(2,4,6-Me3Ph)=CH2)]
• CAS: 919987-21-6
• 化学式: C₂₇H₄₂AlN₅O
• 分子量: 479.645
• InChiKey: TZSWKLCWFYUPSI-UHFFFAOYSA-M

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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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：

  bis[2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl]amine 以 氘代苯 、 甲苯 、 正戊烷 为溶剂， 生成 [(bis-[2-(3,5-dimethyl-1-pyrazolyl)ethyl]amine)AlMe2(OC(2,4,6-Me3Ph)=CH2)]
  参考文献：
  名称：

  Aluminum and Zinc Complexes Based on an Amino-Bis(pyrazolyl) Ligand:  Synthesis, Structures, and Use in MMA and Lactide Polymerization

  摘要：

  The coordination chemistry of bis[2-(3,5-dimethyl-1-pyrazolyl)ethyl]amine (1, LH) with aluminum- and zinc-alkyls has been studied. Reaction of 1 with AlR3 affords the adducts [LH]center dot AlR3 (R = Me, 2; Et, 3), which undergo alkane elimination upon heating to yield the amido complexes [L]AlR2 (R = Me, 4; Et, 5). Reaction of LiO(iPrO)CCMe2 with 2 proceeds via N-H deprotonation to give Li[L]AlMe3 (6), while the former enolate adds to 4 to generate [Me2CC(OiPr)OLi]center dot[L]AlMe2 (7). Similarly, the 1:1 reaction of ZnEt2 with 1 gives [LH]center dot ZnEt2 (9), which is transformed into [L]ZnEt (10) upon heating. When an excess of ZnEt2 was used in the latter reaction, the bimetallic complex [L]ZnEt center dot ZnEt2 (11) was isolated beside 10. Performing the same reaction in the presence of O-2 traces yielded selectively the dinuclear ethyl-ethoxide complex [L]Zn2Et2(mu-OEt) (12), which was alternatively prepared from the reaction of 10 and ZnEt(OEt). Zinc chloride complexes [LH]center dot ZnRCl (R = Et, 13; p-CH3C6H4CH2, 14) and [L]ZnCl (15) were prepared in high yields following similar strategies. Ethyl abstraction from 10 with B(C6F5)(3) yields [L]Zn+EtB(C6F5)(3)(-) (16). All complexes have been characterized by multinuclear nuclear magnetic resonance (NMR), elemental analysis, and single-crystal X-ray diffraction studies for four-coordinate Al complexes 2, 4, and 6 and Zn complexes 9-12 and 14. Aluminate species 6 and 7 initiate the polymerization of methyl methacrylate, and the monomer conversions are improved in the presence of neutral complexes 2 or 4, respectively; however, these methyl methacrylate (MMA) polymerizations are uncontrolled. Polymerization of rac-lactide takes place at 20 degrees C in the presence of zinc ethoxide complex 12 to yield atactic polymers with controlled molecular masses and relatively narrow polydispersities.

  DOI：

  10.1021/ic061749z