magnesium hydride | 22157-78-4

• 英文名称: magnesium hydride
• CAS: 22157-78-4
• 化学式: HMg
• 分子量: 27.0079
• InChiKey: RZCHRULKKYOSQS-DEQYMQKBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.65
• 重原子数：
  1.0
• 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：

  氢气 、 magnesium 生成 magnesium hydride 、 magnesium hydride 、
  参考文献：
  名称：

  Infrared diode laser spectra of MgH and MgD (X 2Σ+)

  摘要：

  Infrared absorption spectra of magnesium hydride in its 2Σ+ ground state have been measured at Doppler limited resolution in a dc discharge of hydrogen over magnesium. Most of the transitions arise from the fundamental bands of 24MgH and 24MgD, but, in addition, a few lines attributable to 25Mg and 26Mg species have been detected, as well as v=2←1 hot band transitions in 24MgH and 24MgD. Most of the lines are characterized by a doublet splitting due to the electron spin–rotation interaction (γN⋅S) which helps to distinguish them from the broader Rydberg transitions of atomic magnesium observed in the same spectral region. The spectra were analyzed in a combined fit with the FIR pure rotational transitions which leads to an accurate set of molecular parameters either for each vibrational level or as Dunham coefficients. The mass dependence of the molecular parameters is examined in terms of possible breakdown of the Born–Oppenheimer approximation.

  DOI：

  10.1063/1.455188

文献信息

• Pulsed Laser Evaporated Magnesium Atom Reactions with Hydrogen: Infrared Spectra of Five Magnesium Hydride Molecules
  作者：Thomas J. Tague、Lester Andrews

  DOI：10.1021/j100086a004

  日期：1994.9

  Pulsed laser ablated magnesium atoms have been codeposited with mixtures of hydrogen and argon onto a 10 K substrate. Assignments to product molecules have been made on the basis of broad-band photolysis and annealing behavior, deuterium and Mg-26 isotopic substitution, and ab initio calculations. The predominant reaction products are MgH (infrared absorption at 1422.1 cm(-1)) and linear MgH2 (nu(3) = 1571.9 cm(-1) and nu(2) = 439.8 cm(-1)). Absorptions attributed to the two lowest energy MgH dimers HMgMgH (1491.8 cm(-1)) and the rhombic dimer (MgH)(2) (1022.8 and 605.4 cm(-1)) are evident as well as the bridged MgH2 dimer HMg(H)(2)-MgH (1531.0, 1164.2, 1013.7, and 613.9 cm(-1)). An increase of HMgMgH and (MgH)2 dimer formation on photolysis indicates photoactivation of Mg-2, allowing reaction with H-2 Annealing of the matrix yielded little increase in dimer, which is indicative of limited mobility of magnesium hydrides in the matrix. However, H-2 complexes with both MgH and MgH2 increased on annealing.