isophthal-di-N-(4-methylphenyl)hydroxamic acid | 178690-80-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: isophthal-di-N-(4-methylphenyl)hydroxamic acid
• 英文别名: 1-N,3-N-dihydroxy-1-N,3-N-bis(4-methylphenyl)benzene-1,3-dicarboxamide
• CAS: 178690-80-7
• 化学式: C₂₂H₂₀N₂O₄
• 分子量: 376.412
• InChiKey: HAWAIOJOXYRDMZ-UHFFFAOYSA-N

物化性质

• 沸点：
  612.0±65.0 °C(Predicted)
• 密度：
  1.350±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.7
• 重原子数：
  28
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.09
• 拓扑面积：
  81.1
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  iron(III)-acetylacetonate 、 isophthal-di-N-(4-methylphenyl)hydroxamic acid 以 N,N-二甲基甲酰胺 为溶剂， 生成
  参考文献：
  名称：

  Symmetry-Based Metal Complex Cluster Formation

  摘要：

  DOI：

  10.1002/anie.199610841
• 作为产物：
  描述：

  4-硝基甲苯 、 N-(对甲苯基)羟胺 在 吡啶 作用下， 以 1,4-二氧六环 为溶剂， 反应 3.0h， 以44%的产率得到isophthal-di-N-(4-methylphenyl)hydroxamic acid
  参考文献：
  名称：

  Dynamic Isomerization of a Supramolecular Tetrahedral M₄L₆ Cluster¹

  摘要：

  The bis-hydroxamate ligand isophthal-di-N-(4-methylphenyl)hydroxamate (E) forms tetrahedral clusters of the type M4E6 (M = Ga(III), Fe(III)). The syntheses of these and several other tetrahedral metal clusters have illustrated a general approach to the design of supramolecular metal clusters based on incommensurate coordination number interactions. In each case, rigid spacers separate bidentate units and preclude formation of metal coordination species other than the one targeted. For the Ga4E6 cluster described here each vertex is a chiral metal center (Delta or Lambda) that generates clusters with T (Delta Delta Delta Delta or Lambda Lambda Lambda Lambda), C-3 (Delta Delta Delta Delta or Lambda Lambda Lambda Lambda), or S-4 (Lambda Lambda Lambda Lambda) symmetry. The rigid ligand spacer is bimodal, accommodating either mixed or homochiral metal centers at either end, but locks in the chirality of the complex once formed. Therefore all three isomers are seen in solution and their interconversion, although still on the NMR time scale, is significantly slower than isomerization of similar unimolecular hydroxamate complexes. The distribution of the isomers in aqueous solution for the T, C3, and S-4 isomers is 4, 58, and 38%, respectively. The barrier to the interconversions, which occur through a nondissociative trigonal twist at the metal centers, is 58 kJ mol(-1) for each of the isomerization steps. The syntheses of the ligand and corresponding iron and gallium complexes are described. The compound Ga4E6. 18 DMF (DMF = dimethylformamide) crystallizes in I4(1)/a with Z = 8, 24.0738(2) Angstrom, and c = 68.5828(5) Angstrom. Full-matrix refinement of data collected on a CCD detector with 7710 observations and 576 variables gave an R factor ton Fl of 0.089. Two crystallographically independent clusters are chemically equivalent, both lying on 4 special positions. The Ga-to-Ga distances between metal centers with like and opposite chiralities are 9.0 and 8.8 Angstrom, respectively. Two different ligand conformations are observed: one bridging homochiral metal centers and the other mixed chiral centers. Their nearly equal stability explains the mix (T, C-3, S-4) Of cluster isomers seen. This ligand couples the metal vertices in the cluster so as to increase significantly the transition state free energy for Lambda-Delta interconversion but does not couple the chirality for the Lambda or Delta ground state.

  DOI：

  10.1021/ja984046s

文献信息

• Beissel, Thomas; Powers, Ryan E.; Raymond, Kenneth N., Angewandte Chemie, 1996, vol. 108, # 10, p. 1166 - 1168
  作者：Beissel, Thomas、Powers, Ryan E.、Raymond, Kenneth N.

  DOI：——

  日期：——