Schrödle, S. and Wachter, Wolfgang and Buchner, Richard and Hefter, Glenn (2008) Scandium Sulfate Complexation in Aqueous Solution by Dielectric Relaxation Spectroscopy. Inorganic Chemistry 47 (19), pp. 8619-8628.
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Ion assocn. in aq. solns. of scandium sulfate has been investigated at 25 °C and at concns. from 0.01 to 0.8 M by broadband dielec. spectroscopy over the frequency range 0.2 ≤ ν/GHz ≤ 89. Detailed anal. of the spectra reveals the presence of both inner- and outer-sphere 1:1 [ScSO4]+(aq) complexes, similar to solns. of other high-valent metal sulfates. Outer-outer-sphere 1:1 complexes are probably also formed, but their contribution is swamped by the presence of higher-order inner-sphere complexes. The latter predominate in the more concd. solns., causing major changes to the low-frequency end of the spectrum. The data, while not definitive, are consistent with fac-[Sc(SO4)3(OH2)3]3- as the major species present. The speciation is strikingly different from that recently reported for aluminum sulfate solns. and indicates that the often-postulated similarity between the aq. chem. of Al(III) and Sc(III) has to be treated with caution.
|Institutions:||Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner|
|Keywords:||scandium cation sulfate complexation aq soln dielec relaxation spectroscopy|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||08 Jun 2012 10:42|
|Last Modified:||08 Jun 2012 10:42|