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Abstract

The structures of dimethylsulfoxide-solvated magnesium and calcium ions have been studied in the solid state and in dimethylsulfoxide solution by X-ray crystallography and large-angle X-ray scattering (LAXS), respectively. The magnesium and calcium ions coordinate six dimethylsulfoxide molecules in both the solid state and solution with mean Mg-O and Ca-O bond distances in solid perchlorate salts of 2.062(4) and 2.303(5) angstrom, respectively. A summary of the coordination chemistry of the hydrated and solvated alkaline earth metal ions shows that beryllium(II) and magnesium ions are tetrahedral and octahedral, respectively, in all solvents studied, while calcium and strontium are eight-coordinated in square antiprismatic fashion in water, but octahedral in dimethylsulfoxide and other organic solvents. Mean M-O bond distances of the hydrated alkaline earth metal ions were used to calculate the ionic radii of the alkaline earth metal ions.

Keywords

alkaline earth metal ions; structure; hydrates; solvates; ionic radii

Published in

Journal of Coordination Chemistry
2005, volume: 58, number: 7, pages: 611-622
Publisher: TAYLOR & FRANCIS LTD

SLU Authors

UKÄ Subject classification

Inorganic Chemistry

Publication identifier

  • DOI: https://doi.org/10.1080/00958970500039181

Permanent link to this page (URI)

https://res.slu.se/id/publ/7996