| 214892-24-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• CAS: 214892-24-7
• 化学式: C₂₀H₂₂Cu₂N₁₂O₂
• 分子量: 589.566
• InChiKey: WKDKDPKALJZTOY-CICMVQISSA-L

反应信息

• 作为产物：
  描述：

  sodium azide 、 以 甲醇 为溶剂， 以76%的产率得到
  参考文献：
  名称：

  Copper (II) complexes of two new oxamidate bis-tetradentate Schiff-base ligands

  摘要：

  Two novel symmetrical bis-tetradentate Schiff base ligands, H2L1 and H4L2, have been prepared from the condensation of N,N'-bis(3-aminopropyl) oxamide with pyridine-2-carbaldehyde and pyrrol-2-carbaldehyde, respectively. The ligands react with copper(II) nitrate in basic medium to yield the dinuclear complexes [Cu2L1](NO3)(2) and [Cu2L2]. [Cu2L1](NO3)(2) reacts with sodium azide to yield the neutral dinuclear complex [Cu2L1(N-3)(2)], which was structurally characterized by X-ray diffraction. The complex crystallizes in the monoclinic system, space group P2(1)/c with cell constants: a = 7.916(2) Angstrom, c = 20.110(4) Angstrom; beta = 95.20(3)degrees, V = 1255.4(4) Angstrom(3), Z = 2. The structure consists of neutral quasi-planar centrosymmetric dinuclear copper(II) molecules, where two crystallographically equivalent copper(II) ions are bridged by an oxamidate group in li ans conformation, resulting in a copper-copper distance of 5.271 Angstrom. Each copper(II) ion occupies the N3O inner Site of the doubly-deprotonated L-1 ligand with bond distances of ca 2.0 Angstrom, whereas a nitrogen atom from the azide group completes the coordination polyhedron with a longer bond distance of 2.340(4) Angstrom. All the dinuclear complexes exhibited strong antiferromagnetic exchange interaction. The magnetic data were analyzed by using the Bleaney-Bowers equation (H = -JS(1)S(2)) leading to singlet-triplet energy values (J) of 425.5 cm(-1) for [Cu2L1](NO3)(2), 427.9 cm(-1) for [Cu2L2] and 424.1 cm(-1) for [Cu-2(L-1)(N-3)(2)]. These J values are a consequence of the ability of the oxamidate-bridge to propagate the antiferromagnetic exchange, interaction between metal ions which allow a large overlap of the d(x2-y2) magnetic orbitals centered on each copper(II) ion. (C) 1998 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0277-5387(98)00040-0