Beryllium monohydride

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Beryllium monohydride
13597-97-2 YesY
Jmol-3D images Image
Molar mass 10.02012 g mol−1
Appearance Colourless gas
176.83 J K−1 mol−1
321.20 kJ mol−1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Beryllium monohydride (BeH) is an example of a molecule with a half-bond order according to molecular orbital theory. It is a metastable monoradical species which has only been observed in the gas phase. In beryllium monohydride, beryllium has a valency of one, and hydrogen has a valency of one.

The dimeric molecule Be2H2 has also been observed in an argon matrix at 10 K[1]


  1. ^ Thomas J. Tague Jr., Lester Andrews (1993). "Reactions of beryllium atoms with hydrogen. Matrix infrared spectra of novel product molecules". J. Am. Chem. Soc. 115 (25). pp. 12111–12116. doi:10.1021/ja00078a057. .