ethyl-malonic acid dihydrazide | 25457-53-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl-malonic acid dihydrazide
• 英文别名: Aethyl-malonsaeure-dihydrazid；Monoethyl-malonsaeuredihydrazid；Monoethylmalonsaeure-dihydrazid；Ethyl-malonsaeurebishydrazid；Ethylmaloylhydrazid；Propanedioic acid, ethyl-, dihydrazide；2-ethylpropanedihydrazide
• CAS: 25457-53-8
• 化学式: C₅H₁₂N₄O₂
• mdl: MFCD00093418
• 分子量: 160.176
• InChiKey: HNSKYWPKSJEQTA-UHFFFAOYSA-N

物化性质

• 熔点：
  166 °C(Solv: ethanol (64-17-5))
• 沸点：
  488.9±28.0 °C(Predicted)
• 密度：
  1.225±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -1.6
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  110
• 氢给体数：
  4
• 氢受体数：
  4

安全信息

• 海关编码：
  2928000090

反应信息

• 作为反应物：
  描述：

  ethyl-malonic acid dihydrazide 、 2-二苯基膦苯甲醛 以75%的产率得到2-ethylmalonic acid 1,3-bis[2-[2-(diphenylphosphino)phenylmethylene]hydrazide]
  参考文献：
  名称：

  Synthesis and characterization of novel bis(diphenylphosphino)-oxalyl and (substituted) malonyl dihydrazones: P,N,N,P-tetradentate complexes of an oxalyl derivative with Cu(II), Pd(II), and Mn(II)

  摘要：

  Novel ligands of bis(diphenylphosphino)-oxalyl, malonyl, and methyl- and ethyl-malonyl dihydrazones were synthesized by condensation of oxalyl, malonyl, methyl-malonyl, and ethyl-malonyl dihydrazide with o-(diphenylphosphino)benzaldehyde in different conditions. The dihydrazones exhibit three different tautomeric structures detected by NMR and IR spectra. The P-31 NMR spectrum demonstrates four different singlet signals, i.e., chemical shifts, of the three respective tautomers. Complexes of the oxalyl ligand with Pd2+, Cu2+, and Mn2+ ions are formed in 1:1 molar ratio. Their structures were characterized by IR, NMR, EPR, MS, EA, and TGA, in which the oxalyl ligand acts as a neutral P,N,N,P-tetradentate chelate. The pH stability of the complexes is in the region of ca. 4.5-7.5 and their activation energy was calculated from the conductivity measurements.

  DOI：

  10.1007/s00706-013-1122-4
• 作为产物：
  描述：

  四乙基戊-1-烯-1,1,3,3-四羧酸酯 生成 ethyl-malonic acid dihydrazide
  参考文献：
  名称：

  不饱和四和三酯与水合肼和氨基脲的反应

  摘要：

  已分离出各种4,5-二取代的吡唑烷基-3-酮（IIc-f）作为3-取代的四乙基丙烯-1,1,3,3-四羧酸酯（I）与水合肼之间反应的中间体。在反应的3-取代的三乙基丙烯-1,1,3-三羧酸盐（VI）之间，并用水合肼，这给乙基-5-氧代Δ没有获得这样的中间体2 -吡唑啉-4-羧酸叔丁酯（III）和适当的饱和酯（VII）。氨基脲盐酸盐与各种酯类似地反应，得到与水合肼相同的最终产物。

  DOI：

  10.1039/p19720001022

文献信息

• Microstructure and mechanical properties of Ti–Si–N coatings
  作者：W. J. Meng、X. D. Zhang、B. Shi、R. C. Tittsworth、L. E. Rehn、P. M. Baldo

  DOI：10.1557/jmr.2002.0381

  日期：2002.10

  A series of Ti–Si–N coatings with 0 < Si < 20 at.% were synthesized by inductively coupled plasma assisted vapor deposition. Coating composition, structure, atomic short-range order, and mechanical response were characterized by Rutherford backscattering spectrometry, transmission electron microscopy, x-ray absorption near-edge structure spectroscopy, and instrumented nanoindentation. These experiments show that the present series of Ti–Si–N coatings consists of a mixture of nanocrystalline titanium nitride (TiN) and amorphous silicon nitride (a-Si:N); i.e., they are TiN/a-Si:N ceramic/ceramic nanocomposites. The hardness of the present series of coatings was found to be less than 32 GPa and to vary smoothly with the Si composition.

  通过电感耦合等离子体辅助气相沉积法合成了一系列 0 < Si < 20 at.% 的 Ti-Si-N 涂层。通过卢瑟福背散射光谱法、透射电子显微镜、X 射线吸收近边结构光谱法和仪器纳米压痕法对涂层的成分、结构、原子短程有序性和机械响应进行了表征。这些实验表明，本系列 Ti-Si-N 涂层由纳米晶氮化钛（TiN）和无定形氮化硅（a-Si:N）的混合物组成，即它们是 TiN/a-Si:N 陶瓷/陶瓷纳米复合材料。研究发现，这一系列涂层的硬度低于 32 GPa，并随硅成分的变化而变化。
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