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Issue 5, 2005
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Mercury dihydride forms a covalent molecular solid

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Atomic mercury in solid hydrogen reacts when subjected to mercury arc irradiation to form the linear HgH2 molecule with strong IR absorptions at 1902.3 and 772.8 cm−1. Annealing leads to HgH2 dimer and trimer and warming above 7 K allows hydrogen to sublime and solid HgH2 to form. This covalent molecular solid is characterized by strong IR absorptions at 1802, 739 and 673 cm−1 and by decomposition at 150–170 K. Solid para-hydrogen gives sharper HgH2 absorptions at 1905.8 and 774.3 cm−1 and forms a more amorphous HgH2 solid with bands at 1813, 741 and 683 cm−1.

Graphical abstract: Mercury dihydride forms a covalent molecular solid

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Publication details

The article was received on 11 Aug 2004, accepted on 03 Dec 2004 and first published on 04 Jan 2005

Article type: Paper
DOI: 10.1039/B412373E
Phys. Chem. Chem. Phys., 2005,7, 750-759

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    Mercury dihydride forms a covalent molecular solid

    X. Wang and L. Andrews, Phys. Chem. Chem. Phys., 2005, 7, 750
    DOI: 10.1039/B412373E

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