uranium dicarbide

• 分子结构分类: 有机化合物 - 碳氢化合物衍生物
• 英文名称: uranium dicarbide
• 化学式: C₂U
• 分子量: 262.051
• InChiKey: XESQPMABODWNSZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.27
• 重原子数：
  3.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为反应物：
  描述：

  uranium dicarbide 生成 uranium sesquicarbide
  参考文献：
  名称：

  Structure of UC2 and U2C3:XRD, 13C NMR and EXAFS study

  摘要：

  In this study, uranium dicarbide (UC2) has been prepared by arc melting and heat treated under vacuum to form uranium sequicarbide (U2C3) in the presence of a second phase UC2-z. Both samples, as cast and heat treated, have been characterised by chemical analyses, X-ray diffraction (XRD), C-13 magic angle spinning nuclear magnetic resonance (MAS-NMR) and by extended X-ray absorption fine structure (EXAFS). The composition, the purity, the various environments of both U and C atoms as well as the bonds length with the coordination number have been determined. By combining a long-range order method (XRD) and short-range order spectroscopy techniques (EXAFS and NMR), a unique view on the microstructure of UC2, before and after heat treatment, and of U2C3 phase has been achieved. (C) 2013 Elsevier B. V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2013.11.202
• 作为产物：
  描述：

  铀 以 neat (no solvent) 为溶剂， 生成 uranium dicarbide
  参考文献：
  名称：

  CH121603

  摘要：

  公开号：

文献信息

• Equilibria of uranium carbides in the molten fluoride solutions of UF3 and UF4 contained in graphite at 850°K
  作者：L.M. Toth、L.O. Gilpatrick

  DOI：10.1016/0022-1902(73)80239-8

  日期：1973.5

  of dilute molten fluoride solutions of UF4 with UC, U2C3 and UC2 at 850°K has been investigated to establish that a UC2 phase, possibly oxygen stabilized, is the stable carbide phase in contact with dilute UF3-UF4 solutions contained in graphite. The carbides were identified by X-ray powder patterns. Lattice parameters for these carbides are included. UF3 and UF4 concentrations in solution were measured

  研究了UF 4与UC，U 2 C 3和UC 2在850°K下的稀熔融氟化物溶液的平衡，以建立UC 2相（可能是氧稳定的）是与稀UF 3接触的稳定碳化物相。-UF 4溶液包含在石墨中。通过X射线粉末图案鉴定出碳化物。这些碳化物的晶格参数也包括在内。通过近红外可见分光光度法测量溶液中的UF 3和UF 4浓度。平衡商Q =（UF 3）4 /（UF 4）根据以下反应，与熔融氟化物溶液接触的每种碳化物均计算为3：4UF3 + xC⇄3UF4 + UCϰ
• Infrared Spectra and Quantum Chemical Calculations of the Uranium Carbide Molecules UC and CUC with Triple Bonds
  作者：Xuefeng Wang、Lester Andrews、Per-Åke Malmqvist、Björn O. Roos、António P. Gonçalves、Cláudia C. L. Pereira、Joaquim Marçalo、Claude Godart、Benjamin Villeroy

  DOI：10.1021/ja102475t

  日期：2010.6.23

  Laser evaporation of carbon-rich uranium/carbon alloys followed by atom reactions in a solid argon matrix and trapping at 8 K gives weak infrared absorptions for CUO at 852 and 804 cm(-1). A new band at 827 cm(-1) becomes a doublet with mixed carbon 12 and 13 isotopes and exhibits the 1.0381 isotopic frequency ratio, which is appropriate for the UC diatomic molecule, and another new band at 891 cm(-1)

  富碳铀/碳合金的激光蒸发，然后是固体氩基质中的原子反应，并在 8 K 下捕获，在 852 和 804 cm(-1) 处为 CUO 提供微弱的红外吸收。827 cm(-1) 处的新谱带变成了混合碳 12 和 13 同位素的双峰，并显示出 1.0381 同位素频率比，这适用于 UC 双原子分子，而 891 cm(-1) 处的另一个新谱带给出了具有 1.0366 同位素频率比的三波段混合同位素谱，这是线性 CUC 分子的特征。具有动力学相关性的 CASPT2 计算发现 C[三键]U[三键]C 基态为线性 3Sigma(u)+，具有 1.840 A 键长和分子轨道占有率，有效键阶为 2.83。
• Electrical resistivities of the uranium carbides
  作者：Hisayuki Matsui、Masayoshi Tamaki、Shoichi Nasu、Toshimasa Kurasawa

  DOI：10.1016/0022-3697(80)90209-7

  日期：1980.1

  Abstract Electrical resistivities of arc-melted uranium carbides, UC, UC2, U2C3 and UC + UC2, were measured over the temperature range between 4 and 1900 K. The monocarbide, dicarbide and the mixture of carbides showed metallic character in their resistivity dependence on temperature above 30 K, while below this the resistivities were constant. U2C3 showed a knee in the resistivity curve at 54.0 K corresponding

  摘要 电弧熔化碳化铀 UC、UC2、U2C3 和 UC + UC2 的电阻率是在 4 到 1900 K 之间的温度范围内测量的。一碳化物、二碳化物和碳化物混合物在其电阻率对温度的依赖性方面表现出金属特性高于 30 K，而低于此电阻率是恒定的。U2C3 在 54.0 K 的电阻率曲线中显示出拐点，对应于磁跃迁。高于 1100 K，U2C3 的电阻率不随温度变化。混合物（UC + UC2 与 U2C3 沉淀物）的电阻率显示在 800 和 950 K 之间停滞。
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: U: SVol.C8, 5.1.5, page 71 - 138
  作者：

  DOI：——

  日期：——
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: U: SVol.C8, 5.1.2, page 12 - 55
  作者：

  DOI：——

  日期：——