| 1435188-94-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• CAS: 1435188-94-5
• 化学式: C₁₃H₁₄N₈O
• 分子量: 298.307
• InChiKey: BQCBNFLAMABNBG-UHFFFAOYSA-N

反应信息

• 作为反应物：
  描述：

  copper(II) choride dihydrate 、 以 甲醇 为溶剂， 以26%的产率得到
  参考文献：
  名称：

  A linear tetranuclear Cu(II) complex exhibiting both ferro and antiferromagnetic couplings: Synthesis, characterization and magneto-structural studies

  摘要：

  The pyrimidinyl hydrazone ligand O=C[NHN=C(Me)(pm)}(2) (pm = 2-pyrimidinyl) (L3H2) has two potentially protic H atoms and multiple donor atoms. The reaction of L3H2 with CuCl2 center dot 2H(2)O yielded the tetranuclear complex [Cu-4(L3H)(2)Cl-6(CH3OH)(2)] (1). Structural studies on 1 reveal the molecule is located about a crystallographic inversion centre, affording two crystallographically independent Cu(II) centres with the two symmetry equivalent [Cu-2(L3H)Cl3CH3OH] units connected via mu(2)-Cl bridges to generate a linear tetranuclear copper complex. The ligand is singly deprotonated (L3H ) and twisted around the diazine N-N' bond, affording an N3 donor set for the Cul centre and an N2O donor set for the Cu2 centre. The Cul ion is five coordinate with an [N-3] donor set from the L3H- ligand and the remaining two sites occupied by Cr anions. The Cu2 ion is six coordinate with the L3H- ligand offering a mer [N2O] donor set, with the three remaining sites occupied by two Cl (-) anions and a MeOH molecule. Magnetic studies reveal the presence of strong antiferromagnetic interactions via the diazine bridge linking the Cul and Cu2 ions and moderate ferromagnetic interactions via the chloro bridges located about the inversion centre, connecting the Cu2 and Cu2i ions. (C) 2019 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.poly.2019.03.006

文献信息

• Self-Assembled Ln(III)₄ (Ln = Eu, Gd, Dy, Ho, Yb) [2 × 2] Square Grids: a New Class of Lanthanide Cluster
  作者：Nicholas M. Randell、Muhammad U. Anwar、Marcus W. Drover、Louise N. Dawe、Laurence K. Thompson

  DOI：10.1021/ic4008813

  日期：2013.6.3

  Yb) into square [2 × 2] grid-like arrays has been readily effected using simple, symmetric ditopic ligands based on a carbohydrazone core. The metal ions are connected via single atom bridges (e.g., μ2-Ohydrazone, μ2-OH, μ2-OMe, μ2-1,1-N3–, μ4-O), depending on reaction conditions. The Gd(III)4 examples exhibit intramolecular antiferromagnetic exchange (−J < 0.11 cm–1), and in one Dy(III)4 example,

  Ln（III）离子（Ln = Eu，Gd，Dy，Ho，Yb）自组装成正方形[2×2]网格状阵列的过程很容易就已经实现了，它是基于碳hydr核心的简单，对称的对位配位体。所述金属离子经由单原子桥连接（例如，μ 2 -O腙，μ 2 -OH，μ 2 -OMe，μ 2 -1,1-N 3 -，μ 4 -O），这取决于反应条件。钆（III）4点的例子显示出分子内反铁磁交换（ - Ĵ <0.11厘米-1），且在一个镝（III）4例如，具有μ的组合2 -1,1-N 3 -和μ 4个-O桥联相邻的金属离子，SMM行为观察。一个热驱动松弛过程是在温度范围10-25ķ观察（τ 0 = 6.5（1）×10个-7 S，Ù EFF = 110（1）K）中的1800奥斯特外磁场的存在下，采用抑制第二个基于量子的弛豫过程。Ln（III）离子的扩展基团（通常是过渡金属离子）具有受控的自组装性，这表明该方法对镧系元素的一般适