[Ni(2-hydroxymethylpyridine(-1H))(ethanol)Cl]4*H2O | 618101-46-5

• 英文名称: [Ni(2-hydroxymethylpyridine(-1H))(ethanol)Cl]4*H2O
• 英文别名: [Ni(hmp)(EtOH)Cl]4*H2O
• CAS: 618101-46-5
• 化学式: C₃₂H₄₈Cl₄N₄Ni₄O₈*H₂O
• 分子量: 1011.34
• InChiKey: FPVPYMVIJKSXBM-UHFFFAOYSA-J

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  乙醇 、 nickel(II) chloride hexahydrate 、 2-吡啶甲醇 在 NaOC₂H₅ 作用下， 以 乙醇 为溶剂， 以30%的产率得到[Ni(2-hydroxymethylpyridine(-1H))(ethanol)Cl]4*H2O
  参考文献：
  名称：

  Fast Magnetization Tunneling in Tetranickel(II) Single-Molecule Magnets

  摘要：

  A series of Ni-4 cubane complexes with the composition [Ni(hmp)(ROH)Cl](4) complexes 1-4 where R=-CH3 (complex 1), -CH2CH3 (complex 2), -CH2CH2(C4H9) (complex 3), -CH2CH2CH2(C6H11) (complex 4), hmp(-) is the anion of 2-hydroxymethylpyridine, t-Buhmp(-) is the anion of 4-tert-butyl-2-hydroxymethylpyridine, and dmb is 3,3-dimethyl-1-butanol] and [Ni(hmp)(dmb)Br](4) (complex 5) and [Ni(t-Buhmp)(dmb)Cl](4) (complex 6) were prepared. All six complexes were characterized by dc magnetic susceptibility data to be ferromagnetically coupled to give an S = 4 ground state with significant magnetoanisotropy (D approximate to -0.6 cm(-1)). Magnetization hysteresis measurements carried out on single crystals of complexes 1-6 establish the single-molecule magnet (SMM) behavior of these complexes. The exchange bias observed in the magnetization hysteresis loops of complexes 1 and 2 is dramatically decreased to zero in complex 3, where the bulky dmb ligand is employed. Fast tunneling of magnetization is observed for the high-symmetry (S-4 site symmetry) Ni-4 complexes in the crystal of complex 3, and the tunneling rate can even be enhanced by destroying the S-4 site symmetry, as is the case for complex 4, where there are two crystallographically different Ni4 molecules, one with C-2 and the other with C-1 site symmetry. Magnetic ordering temperatures due to intermolecular dipolar and magnetic exchange interactions were determined by means of very low-temperature ac susceptibility measurements; complex 1 orders at 1100 mK, complex 3 at 290 mK, complex 4 at similar to 80 mK, and complex 6 at < 50 mK. This confirms that bulkier ligands correspond to more isolated molecules, and therefore, magnetic ordering occurs at lower temperatures for those complexes with the bulkiest ligands.

  DOI：

  10.1021/ic050093r