Change search
ReferencesLink to record
Permanent link

Direct link
An EXAFS Spectroscopic, Large Angle X-Ray Scattering and Crystallo¬graphic Study of the Hexahydrated and the Dimethyl Sulfoxide and Pyridine-1-Oxide Hexasolvated Mercury(II) Ions
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
Show others and affiliations
2008 (English)In: Chemistry, A European Journal, Vol. 14, 6687-6696 p.Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [en]

The structure of the solvated mercury(II) ion in aqueous and dimethyl sulfoxide solution has been studied by means of large angle X-ray scattering (LAXS) and EXAFS tech¬niques. The distribution of the Hg-O bond distances is unusually wide and asymmetric in both solvents. In aqueous solution hexahydrated [Hg(OH2)6]2+ ions in distorted octahedral configuration, with the centroid of the Hg-O bond distances at 2.38(1) Å, are surrounded by a diffuse second hydration sphere, with HgOII distances around a mean value of 4.20(2) Å. In dimethyl sulfoxide solution the six Hg-O and HgS distances of the hexasolvated Hg(OS(CH3)2)6]2+ complex are centered around 2.38(1) and 3.45(2) Å, respectively. The crystal structure of hexakis¬(pyridine-1-oxide)mercury(II) perchlorate has been re-determi¬ned at 100 K. The space group R implies six equal Hg-O bond distances of 2.3416(7) Å for the Hg(ONC5H5)62+ complex, as also for the hexaaquamercury(II) perchlorate and hexakis(dimethyl sulfoxide)mercury(II) trifluoro¬methanesulfonate compounds, according to previous crystallographic results. However, EXAFS results for those compounds in all cases reveal strongly asymmetric Hg-O bond distance distributions. Vibronic coupling of close valence states in a so-called Pseudo Jahn-Teller Effect probably induces the distorted configurations.

Place, publisher, year, edition, pages
2008. Vol. 14, 6687-6696 p.
Keyword [en]
Mercury(II) solvation, EXAFS spectroscopy, X-ray diffraction, solution structure
National Category
Inorganic Chemistry
URN: urn:nbn:se:su:diva-14876ISI: 000258217000016OAI: diva2:181396
Available from: 2008-11-06 Created: 2008-11-06 Last updated: 2011-01-10Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Eriksson, LarsSandström, Magnus
By organisation
Department of Physical, Inorganic and Structural Chemistry
Inorganic Chemistry

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link