Hydrogen anion
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(Redirected from Hydride ion)
| Hydrogen anion | |
|---|---|
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Hydride[1] |
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| Identifiers | |
| CAS number | 12184-88-2 |
| PubChem | 166653 |
| ChemSpider | 145831  |
| ChEBI | CHEBI:29239 |
| Gmelin Reference | 14911 |
| Jmol-3D images | Image 1 |
|
|
|
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| Properties | |
| Molecular formula | H− |
| Molar mass | 1.00794 g mol-1 |
| Exact mass | 1.007825032 g mol-1 |
| Thermochemistry | |
| Standard molar entropy S |
108.96 J K-1 mol-1 |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
The hydrogen anion is a negative hydrogen ion, H−. It is an important constituent of the atmosphere of stars, such as the Sun, where it is the dominant absorber of photons with energies in the range 0.75-4.0 eV, ranging from the infrared into the visible spectrum (Rau 1999). It also occurs in the Earth's ionosphere (Rau 1999).
Its existence was first proven theoretically by Hans Bethe in 1929 (Bethe 1929). H− is unusual because it has no bound excited states, as was finally proven in 1977 (Hill 1977). It has been studied experimentally using particle accelerators (Bryant 1977).
Chemical compounds that formally contain a hydrogen anion are called hydrides.
[edit] Sources and references
- Bethe H. (1929). Z. Phys., 57, 815
- Bryant H.C. (1977). Phys. Rev. Lett. 38, 228
- Hill R. N. (1977). Phys. Rev. Lett. 38, 643
- Rau A. (1999). The Negative Ion of Hydrogen, Chapter 5 of Srinivasan (1999)
- Srinivasan G. (1999). From White Dwarfs to Black Holes: The Legacy of S. Chandrasekhar, (Chicago: University of Chicago Press)
[edit] See also
- Hydron (hydrogen cation)
- Hydronium
- Proton
- Hydrogen ion
[edit] References
- ^ "Hydride - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=166653.
