calcium amalgam

• 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: calcium amalgam
• 化学式: CaHg
• 分子量: 240.668
• InChiKey: ZWNYSLSHCJTEBU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.92
• 重原子数：
  2.0
• 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：

  calcium 、 汞 以 neat (no solvent) 为溶剂， 生成 calcium amalgam
  参考文献：
  名称：

  Alkaline-Earth Metal Mercury Intermetallics A_11−xHg_54+x (A = Ca, Sr)

  摘要：

  Re-examination of the mercury-rich regions of the Ca-Hg and Sr-Hg phase diagrams has shown that the phases previously identified as "AHg(3.6)" should be reformulated as A(11-x)Hg(54+x) (A = Ca, Sr). The crystal structures for representative members of these A(11-x)Hg(54+x) phases were determined from single-crystal X-ray diffraction data (Pearson symbol hP65, space group P (6) over bar; a = 13.389(1) angstrom, c = 9.615(1) angstrom for Ca10.92(2)Hg54.08 (x = 0.08(2)); a = 13.602(2) angstrom, c = 9.818(1) angstrom for Sr10.48(4)Hg54.52 (x = 0.52(4))) and confirmed by powder Rietveld refinements (R-B = 0.020 for Ca10.7(2)Hg54.3 and 0.014 for Sr10.7(3)Hg54.3). Diverse coordination polyhedra surround the A (CN14-16, multiply capped pentagonal or hexagonal prisms as well as Friauf polyhedra) and Hg atoms (CN11-13, pentacapped trigonal prisms and icosahedra). Partial disorder of Hg into one of the A sites accounts for the nonstoichiometry in the A(11-x)Hg(54+x) phases. If this disordered A site is completely occupied by Hg atoms, the composition is constrained to a maximum of x = 2 in A(11-x)Hg(54+x), corresponding to a small homogeneity range of "A(0.14-0).Hg-17(0.86-0.83)"; the true homogeneity range is likely narrower. The structure can be regarded as being built up from a stacking of triangular nets with hexagonal voids that are filled with single atoms or various clusters. In particular, the presence of triangular Hg-3 clusters in ordered orientations distinguishes this structure from that of the related Gd14Ag51-type structure, in which triangular Ag-3 clusters are in disordered orientations. Band structure calculations reveal a small degree of electron transfer from the A to Hg atoms, supporting the presence of a partially anionic mercuride substructure.

  DOI：

  10.1021/ic7015148
• 作为试剂：
  描述：

  4-羟基苯丙酮 在 sodium hydroxide 、 calcium amalgam 作用下， 生成 meso-3,4-bis-(4-hydroxy-phenyl)-hexane-3,4-diol 、 racem.-3.4-bis-(4-hydroxy-phenyl)-hexanediol-(3.4)
  参考文献：
  名称：

  Manufacture of dienoestrol

  摘要：

  公开号：

  US02464203A1

文献信息

• Electroreduction of alkaline-earth metal cations at mercury in aprotic media
  作者：W. Ronald Fawcett、Jan S. Jaworski

  DOI：10.1039/f19827801971

  日期：——

  The kinetics of the electroreduction of the alkaline-earth metal cations have been determined at mercury in dimethylformamide and acetonitrile containing various tetra-alkylammonium perchlorates as supporting electrolytes. Kinetic data were also obtained for the electro-oxidation of the corresponding amalgams. The kinetic parameters were observed to depend markedly on solution composition, the standard

  已在汞中的二甲基甲酰胺和乙腈中测定了碱土金属阳离子的电还原动力学，乙腈中含有各种高氯酸四烷基铵作为辅助电解质。还获得了相应汞齐电氧化的动力学数据。观察到动力学参数显着取决于溶液组成，标准速率常数随着溶剂的阳离子溶剂化能力的降低以及四烷基铵阳离子的结晶半径的增加而增加。根据对双层效应的详细分析，可以得出结论，还原过程的动力学是通过阳离子在电极上的吸附以及随后转移到金属相中来控制的。