molybdenum pentaboride

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: molybdenum pentaboride
• 英文别名: molybdenum boride；borane;molybdenum
• 化学式: B₅Mo₂
• 分子量: 245.935
• InChiKey: YESLZRKEZNNWOB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -5.92
• 重原子数：
  7.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  硼烷 、 钼 以 melt 为溶剂， 生成 molybdenum pentaboride
  参考文献：
  名称：

  Mo2B5 在 298K 形成的标准熵

  摘要：

  摘要 Mo 2 B 5 在298 K 时的标准生成熵Δ f S ° 298 是通过松弛法测量从接近绝对零值(2 K) 到300 K 的热容(C p ) 来确定的。Mo 2 B 5 的测定Δ f S° 298 为-3.543 J K -1 mol -1 。发现其德拜温度 Θ D 很高（540 K），表明晶格坚硬且振动熵降低。

  DOI：

  10.1016/j.jallcom.2003.12.028
• 作为试剂：
  描述：

  氢气 、 一氧化二氮 在 molybdenum pentaboride 作用下， 以 gas 为溶剂， 生成 水
  参考文献：
  名称：

  Vlasenko, N. V.; Il'chenko, N. I., Ukrainskij Khimicheskij Zhurnal, 1991, vol. 57/7, p. 60 - 62

  摘要：

  DOI：

文献信息

• Preparation of Cast Mo2B5 by Self-Propagating High-Temperature Synthesis Metallurgy Methods
  作者：V. A. Gorshkov、N. V. Sachkova、N. Yu. Khomenko

  DOI：10.1134/s0020168518120051

  日期：2018.12

  an initial excess gas (Ar) pressure p0 = 5 MPa. In the experiments, we used thermite-type starting mixtures consisting of molybdenum oxide, aluminum, boron oxide, and elemental boron powders. The combustion of such mixtures yields two types of final product: Mo2B5 and Al2O3. The combustion temperatures of the starting mixtures used in our experiments have been shown to exceed the melting points of the

  摘要—本文报道了一种通过自蔓延高温合成（SHS）冶金方法制备的五硼化二钼酸铸造方法。在SHS反应器中以初始过剩气体（Ar）压力p 0 = 5 MPa进行实验。在实验中，我们使用了由氧化钼，铝，氧化硼和元素硼粉组成的铝热型原料混合物。这种混合物的燃烧产生两种类型的最终产物：Mo 2 B 5和Al 2 O 3。我们的实验中使用的起始混合物的燃烧温度已显示超过最终产物的熔点，因此最终产物以液态（浇铸）形成。在重力作用下，较重的相Mo 2 B 5沉降下来形成下部锭，而较轻的相Al 2 O 3形成上部锭。合成产物已通过X射线衍射和局部微结构分析进行了表征。结果表明，起始混合物的组成和量对合成参数，Mo 2 B 5的组成和微观结构有重要影响。。我们为制备单相铸造五钼二钼酸优化了条件。
• Standard entropy of formation of Mo2B5 at 298K
  作者：M Morishita、K Koyama、S Yagi

  DOI：10.1016/j.jallcom.2003.12.028

  日期：2004.8

  Abstract The standard entropy of formation at 298 K, Δ f S ° 298 , of Mo 2 B 5 was determined from measuring the heat capacities ( C p ) from near absolute zero (2 K) to 300 K by the relaxation method. The determined Δ f S ° 298 of Mo 2 B 5 was −3.543 J K −1 mol −1 . Its Debye temperature, Θ D , was found to be high (540 K), indicating that the crystal lattice is hard and the entropy of vibration is decreased

  摘要 Mo 2 B 5 在298 K 时的标准生成熵Δ f S ° 298 是通过松弛法测量从接近绝对零值(2 K) 到300 K 的热容(C p ) 来确定的。Mo 2 B 5 的测定Δ f S° 298 为-3.543 J K -1 mol -1 。发现其德拜温度 Θ D 很高（540 K），表明晶格坚硬且振动熵降低。
• Malyshev; Uskova; Shapoval, Russian Journal of Inorganic Chemistry, 1996, vol. 41, # 11, p. 1682 - 1685
  作者：Malyshev、Uskova、Shapoval

  DOI：——

  日期：——
• Preparation of molybdenum borides by combustion synthesis involving solid-phase displacement reactions
  作者：C.L. Yeh、W.S. Hsu

  DOI：10.1016/j.jallcom.2007.03.024

  日期：2008.6

  Preparation of molybdenum borides, of five different phases in the Mo-B binary system (including Mo2B, MoB, MoB2, Mo2B5, and MoB4) was performed by self-propagating high-temperature synthesis (SHS) with two kinds of the reactant samples. When elemental powder compacts with an exact stoichiometry corresponding to the boride phase were employed, self-sustaining reaction was only achieved in the sample with Mo:B = 1: 1 and nearly single-phase MOB was yielded. Therefore, the other four boride compounds were prepared from the reactant compacts composed of MoO3, Mo, and B powders, within which the displacement reaction Of MoO3 with boron was involved in combustion synthesis. Experimental evidence shows that the extent of displacement reaction in the overall reaction has a significant impact on sustainability of the synthesis reaction, combustion temperature, reaction front velocity, and composition of the end product. An increase in the solid-phase displacement reaction taking place during the SHS process contributes more heat flux to the synthesis reaction, thus resulting in the increase of combustion temperature and enhancement of the reaction front velocity. Based upon the XRD analysis, formation of Mo2B, MoB2, and Mo2B5 as the dominant boride phase in the end product was successful through the SHS reaction with powder compacts under appropriate stoichiometries between MoO3, Mo, and B. However, a poor conversion was observed in the synthesis of MoB4. The powder compact prepared for the production of MoB4 yielded Mostly Mo2B5. (C) 2007 Elsevier B.V. All rights reserved.
• Mamontova, M. Yu.; Filatova, L. A.; Sidorenko, F. A., Inorganic Materials, <hi>1990</hi>, vol. 26, p. 527 - 529
  作者：Mamontova, M. Yu.、Filatova, L. A.、Sidorenko, F. A.、Shtol'ts, A. K.

  DOI：——

  日期：——