| 179930-83-7

• 分子结构分类: 有机化合物 - 苯类化合物
• CAS: 179930-83-7
• 化学式: C₂₈H₂₆MnN₄O₂*ClO₄
• 分子量: 604.929
• InChiKey: LYSIDTTWHDHBHN-OVUNTVOFSA-K

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  2-[[[2-(2-pyridyl)ethyl]imino]methyl]phenol 、 manganese(II) perchlorate hexahydrate 在 三乙胺 作用下， 以 甲醇 为溶剂， 反应 4.0h， 以56%的产率得到
  参考文献：
  名称：

  Mn(III) and Mn(II) complexes of tridentate Schiff base ligands; synthesis, characterization, structure, electrochemistry and catalytic activity

  摘要：

  Three Mn(III) complexes [Mn(L-1)(2)] (ClO4)1, [Mn(L-2)(2)] (ClO4)2, [Mn(L-3)(2)] (ClO4)3, and one Mn(II) complex [Mn(L-4)(2)]4 were studied for their efficiency as catalysts for epoxidation of olefins with H2O2 at room temperature and 0 degrees C in the presence of ammonium acetate-acetic acid or triethylamine-perchloric acid system as co-catalyst/buffer. The complexes were obtained from the reaction of Mn(ClO4)(2)center dot 6H(2)0 with NNO tridentate Schiff base ligands HL1-HL4 synthesized from the condensation reaction of 2-(2-aminoethyl) pyridine and 2-hydroxybenzaldehyde (HL1), 5-chloro-2-hydroxybenzaldehyde (HL2), 5-methoxy- 2-hydroxybenzaldehyde (HL3), or 5-nitro-2-hydroxybenzaldehyde (HL4) respectively. The complexes were characterized by spectroscopic techniques as well as by single crystal X-ray diffraction analysis. Electronic effect of the substituents on epoxide yield was also investigated. The crystal structures of complexes confirm coordination of the manganese ion to the ligands through the NNO atoms of the ligands. The spectral changes observed as a function of time for the reaction of the complexes with aqueous (30%) hydrogen peroxide indicates possible formation of an intermediate product; hydroperoxo-complex implicated in the epoxidation reaction. The complexes catalyzed epoxidation of cyclohexene with low yield at room temperature but higher yield at 0 degrees C in the order complex 3 lower than 1, 1 lower than 2, with the Mn(II) complex 4 recording highest epoxide yield of 9% with turnover of 2.25 at room temperature and yield of 58% with turnover of 14.5 at 0 degrees C in the presence of ammonium acetate-acetic acid system/buffer. With the triethylamine-perchloric acid system/buffer, epoxide yield of 46% and turnover of 11.5 was recorded at room temperature while 44% with turnover of 11.0 was obtained at 0 degrees C for complex 4. (C) 2018 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.ica.2018.01.027

文献信息

• Synthesis and Characterization of Manganese(III) Complexes with 2-{<i>N</i>-[2-(4-Imidazolyl)ethyl]iminomethyl}phenol or 2-{<i>N</i>-[2-(2-Pyridyl)ethyl]iminomethyl}phenol
  作者：Masahiro Mikuriya、Ryoji Nukada、Wataru Tokami、Youichi Hashimoto、Toshinori Fujii

  DOI：10.1246/bcsj.69.1573

  日期：1996.6

  Manganese(III) complexes with 2-N-[2-(4-imidazolyl)ethyl]iminomethyl}phenol (HL1) or 2-N-[2-(2-pyridyl)ethyl]iminomethyl}phenol (HL2), [MnL12]ClO4·CH3OH (1) and [MnL22]ClO4 (2), have been synthesized and characterized by infrared and electronic spectra, cyclic voltammetry, and temperature dependence of magnetic susceptibilities (80—300 K). The molecular structures of 1 and 2 were determined by single-crystal

  锰(III)与2-N-[2-(4-咪唑基)乙基]亚氨基甲基}苯酚(HL1)或2-N-[2-(2-吡啶基)乙基]亚氨基甲基}苯酚(HL2)的络合物， [MnL12]ClO4·CH3OH (1) 和 [MnL22]ClO4 (2) 已合成并通过红外和电子光谱、循环伏安法以及磁化率 (80-300 K) 的温度依赖性进行表征。1和2的分子结构通过单晶X射线结构分析确定。锰原子采用拉长的八面体几何结构，具有两个酚氧原子、两个亚胺氮原子和两个咪唑基或吡啶基氮原子。