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A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry
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Published on: January 8, 2016

Mercury dihydride forms a covalent molecular solid.

Xuefeng Wang1, Lester Andrews

  • 1Department of Chemistry, University of Virginia, PO Box 400319, Charlottesville, VA 22904-4319, USA.

Physical Chemistry Chemical Physics : PCCP
|October 2, 2009
PubMed
Summary

Researchers synthesized mercury dihydride (HgH2) in solid hydrogen via UV irradiation. This study details the molecular properties, aggregation, and thermal decomposition of HgH2 in solid matrices.

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Area of Science:

  • * Inorganic Chemistry
  • * Solid-state Chemistry
  • * Spectroscopy

Background:

  • * Mercury dihydride (HgH2) is a novel inorganic compound.
  • * Understanding its formation and properties in solid matrices is crucial for low-temperature chemistry.

Purpose of the Study:

  • * To synthesize and characterize mercury dihydride (HgH2) in solid hydrogen.
  • * To investigate the influence of solid para-hydrogen on HgH2 properties.
  • * To determine the thermal stability and decomposition pathways of HgH2.

Main Methods:

  • * Atomic mercury was irradiated in solid hydrogen using a mercury arc lamp.
  • * Infrared (IR) spectroscopy was employed to identify HgH2 and its aggregates.
  • * Samples were annealed and warmed to study phase transitions and decomposition.

Main Results:

  • * HgH2 molecules were formed with characteristic IR absorptions at 1902.3 and 772.8 cm(-1).
  • * Annealing led to the formation of HgH2 dimers and trimers.
  • * Solid HgH2 decomposed between 150-170 K, with distinct IR bands observed for the solid phase.

Conclusions:

  • * Mercury dihydride (HgH2) can be synthesized and stabilized in a solid molecular form.
  • * Solid para-hydrogen yields sharper spectral features and more amorphous HgH2 solids.
  • * The study provides fundamental insights into the vibrational spectra and thermal behavior of HgH2.