氢氦阳离子 | 17009-49-3

• 分子结构分类: 无机化合物 - 均质非金属化合物 - 均质惰性气体
• 中文名称: 氢氦阳离子
• 英文名称: hydrohelium cation
• CAS: 17009-49-3
• 化学式: HHe
• 分子量: 5.01054
• InChiKey: HSFAAVLNFOAYQX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.27
• 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

• 作为反应物：
  描述：

  氢氦阳离子 、 氢化钾 生成 helium hydride
  参考文献：
  名称：

  Neutralized ion‐beam studies of the rare gas hydrides: Observation of unique metastability for NeH

  摘要：

  The rare gas hydride radicals have been produced by charge exchange of the corresponding ion in a mass selected, high velocity beam with K, Na, Mg, Zn, or Hg target metals. NeH shows unique behavior, being produced in both dissociative and long-lived (>5.0 μs) metastable states. Arguments based on energetic considerations are presented that the observed metastability should be associated with the ground state of the NeH radical, requiring that it have a shallow well and dissociation barrier analogous to those previously determined for the ground states of the isoelectronic NH4, H3O, and H2F radicals. The existence of a structured radiative transition near 6.1 eV is predicted for the NeH radical. The other rare gas hydrides exhibit only dissociation of the radical with the kinetic energy released explainable in terms of production of known electronic states of the radicals by near resonant electron transfer. For HeH and ArH the first excited electronic state (A 2Σ+) is observed to efficiently predissociate into the repulsive ground state, whereas for KrH and XeH, lower limits of 4.5 and 3.9 eV, respectively, are determined for the energies of the corresponding excited states with respect to the separated ground state atoms.

  DOI：

  10.1063/1.453955
• 作为产物：
  描述：

  氦气 、 氢气 以 gas 为溶剂， 生成 氢氦阳离子
  参考文献：
  名称：

  State-selected ion-molecule reactions: H+2(ν) + He → HeH+ + H and He + H+ + H

  摘要：

  DOI：

  10.1016/0301-0104(87)80008-3

文献信息

• Rotational spectroscopy of molecular ions using diode lasers
  作者：Di‐Jia Liu、Wing‐Cheung Ho、Takeshi Oka

  DOI：10.1063/1.453084

  日期：1987.9

  We report here the first application of tunable diode lasers to study the pure rotational spectroscopy of molecular ions. High J rotational transitions of molecular cations ArH+, NeH+, HeH+, OH+, H2O+, and anion OH− have been observed.
• Collision energy dependence of product branching in Penning ionization: He*(2 ¹<i>S</i>, 2 ³<i>S</i>) + H₂, D₂, and HD
  作者：D. W. Martin、C. Weiser、R. F. Sperlein、D. L. Bernfeld、P. E. Siska

  DOI：10.1063/1.456049

  日期：1989.2

  Relative ionization cross sections for the title systems with articulation of all product ion channels have been measured in the collision energy range 1.5–4.0 kcal/mol using crossed supersonic molecular beams; the H2 results have been extended down to 0.5 kcal/mol by the use of a 10% H2/Ar seeded beam. The data are interpreted with a microscopic two-step model that assumes ionization near the turning point in the excited state, a centrifugal barrier criterion for ionic complex formation, and statistical partitioning of flux among the possible ionic products, i.e., phase-space theory. A full statistical calculation underestimates the amount of rearrangement ionization He*+H2→HeH++H+e− by a factor of 2, but one which excludes antiparallel coupling of orbital and rotational angular momenta in the H+2 channel is in better accord with the data. A substantial isotope effect favoring HeD+ over HeH+ in the HD reactions by a factor of 1.9±0.2 is well represented by the model.
• Diode laser spectra and potential energy curve for the molecular ion HeH+
  作者：J. Purder、S. Civiš、C.E. Blom、M.C. van Hemert

  DOI：10.1016/0022-2852(92)90504-h

  日期：1992.5
• The He++H2→HeH++H*(2s,2p) reaction: Study of the s and p contributions in a coincidence-correlation experiment
  作者：D. Dhuicq、B. Jugi、C. Benoit、V. Sidis

  DOI：10.1063/1.476588

  日期：1998.7.8

  The HeH+ ions produced in the He++H2 reaction at Ecm=20 eV are analyzed in coincidence with the other reaction product: either an H*(2s) metastable atom or an H*(2p) atom. The measurements are restricted to laboratory scattering angles of the HeH+ ions in the range 5°&lt;θ&lt;15° encompassing the maximum of the differential cross section for their production. The H*(2s) atoms are observed at a corresponding fixed angle around −90° relative to the incident He+ direction. The Lα radiation which is the signature of the H*(2p) atom is detected at various angles in the collision plane; this provides polarization (in particular alignment) parameters describing the H*(2p) electron cloud. The HeH+ differential cross section maximum is composed of a few peaks associated with the H*(2p or 2s) species. The H*(2s) to H*(2p) cross section ratio is around 0.1. For the HeH+ peaks at small scattering angles, the Lα radiation patterns obtained for the nascent H*(2p) electron cloud are essentially of dipolar type. The measured alignment angle relative to the final HeH+ center of mass direction lies in the range 67°–81°. A simple model is devised to relate these observations to the H*(n=2) probability amplitudes formed right after the reaction, that is, before post-reaction Stark effect in the field of the receding HeH+ ion together with Coriolis coupling modify these amplitudes. The analysis shows that contribution of the 2p⊥ state lying perpendicular to the axis joining the H* atom to the HeH+ center of charge predominates. This is attributed to a dominant role played by the 2pπu crossing between the potential energy surfaces of the (He–H2)+ compound. It also implies, in agreement with earlier predictions of Dhuicq et al. [Chem. Phys. 206, 139 (1996)] that this compound is bent when going through the important He++H2}→He+H2+*}→HeH++H*} stages of the reaction at the investigated energy. At the largest angles investigated, evidence is seen for the emergence of an additional mechanism attributed to the 2sσg crossing.
• Infrared spectra of ⁴HeH⁺, ⁴HeD⁺, ³HeH⁺, and ³HeD⁺
  作者：Mark W. Crofton、Robert S. Altman、Nathan N. Haese、Takeshi Oka

  DOI：10.1063/1.457456

  日期：1989.11.15

  Isotopic species of the HeH+ molecular ion provide an excellent testing ground for studying isotopic dependence of vibration–rotation constants because of the small masses of He and H isotopes. We have observed infrared spectra of the hot band v=2←1 of HeH+ and fundamental bands of isotopic species HeD+, 3HeH+, and 3HeD+, and obtained the Dunham coefficients Ykl, and the isotopically independent parameters Ukl, ΔHekl, and ΔHkl.