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| IUPAC name Mercury(I) hydride | |
| Other names
Dimercurane Mercurous hydride | |
| Identifiers | |
| 3D model (JSmol) | |
| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| Properties | |
| Chemical formula | HgH |
| Molar mass | 201.60 g mol |
| Related compounds | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references | |
Mercury(I) hydride (systematically named hydridomercury(•)) is an inorganic compound with the chemical formula HgH (also written as HgH). It is a photosensitive, colourless gas, and is one of the simplest mercury hydrides.
Chemical properties
Mercury(I) hydride is an unstable gas and is the heaviest group 12 monohydride. Furthermore, mercury(I) hydride has a linear (C∞v) structure. By weight percent, the composition of mercury(I) hydride is 0.50% hydrogen and 99.50% mercury. In mercury(I) hydride, the formal oxidation states of hydrogen and mercury are −1 and +1, respectively, because of the electronegativity of mercury is lower than that of hydrogen. The stability of metal hydrides with the formula MH (M = Zn-Hg) increases as the atomic number of M increases.
The Hg-H bond is very weak and therefore the compound has only been matrix isolated at temperatures up to 6 K. The dihydride, HgH2, has also been detected this way.
A related compound is dihydrido-1κH,2κH-dimercury with the formula Hg
2H
2.
References
- "Mercury hydride". Chemistry WebBook. USA: National Institute of Standards and Technology. Retrieved 14 October 2012.
- Aldridge, Simon; Downs, Anthony J. (2001). "Hydrides of the Main-Group Metals: New Variations on an Old Theme". Chemical Reviews. 101 (11): 3305–65. doi:10.1021/cr960151d. PMID 11840988.
- Knight, Lon B. (1971). "Hyperfine Interaction, Chemical Bonding, and Isotope Effect in ZnH, CdH, and HgH Molecules". The Journal of Chemical Physics. 55 (5): 2061. doi:10.1063/1.1676373.
| Mercury compounds | |||
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| Mercury(I) | |||
| Mercury(II) |
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| Mercury(IV) |
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| Amalgams | |||
| Mercury cations | |||
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