| 1258315-65-9

• 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: 1258315-65-9
• 化学式: C₂₈H₂₄EuN₉O₉
• 分子量: 782.513
• InChiKey: IOMHFNXUNDXUHS-XWGQSNKRSA-N

反应信息

• 作为产物：
  描述：

  europium(III) nitrate hexahydrate 、 benzilbis((acetylpyridin-2-yl)methylidenehydrazone) 以 乙腈 为溶剂， 以50%的产率得到
  参考文献：
  名称：

  Mononuclear single helices of lanthanum(III) and europium(III). Metal dependent diastereomeric excess

  摘要：

  Using the 1: 2 condensate of benzildihydrazone and 2-acetylpyridine as a tetradentate N donor ligand L, LaL(NO3)(3) (1) and EuL(NO3)(3) (2), which are pale yellow in colour, are synthesized. While single crystals of 1 could not be obtained, 2 crystallises as a monodichloromethane solvate, 2 center dot CH2Cl2 in the space group Cc with a = 11.7099(5) angstrom, b = 16.4872(5) angstrom, c = 17.9224(6) angstrom and beta = 104.048(4)degrees. From the X-ray crystal structure, 2 is found to be a rare example of monohelical complex of Eu(III). Complex 1 is diamagnetic. The magnetic moment of 2 at room temperature is 3.32 BM. Comparing the FT-IR spectra of 1 and 2, it is concluded that 1 also is a mononuclear single helix. H-1 NMR reveals that both 1 and 2 are mixtures of two diastereomers. In the case of the La(III) complex (1), the diastereomeric excess is only 10% but in the Eu(III) complex 2 it is 80%. The occurrence of diastereomerism is explained by the chiralities of the helical motif and the type of pentakis chelates present in 1 and 2. (C) 2010 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.ica.2010.05.016