Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
87 (1987), S. 620-629
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Concentrated aqueous solutions of three transition metal bromides (ZnBr2, CuBr2, and NiBr2) and an alkali bromide (RbBr) have been studied with differential anomalous scattering (DAS) and extended x-ray absorption fine structure (EXAFS). The aq-ZnBr2 solutions exhibit considerable inner-shell ion complexing with the formation of tetrahedral complexes about the Zn2+. In aq-CuBr2, the Cu2+ has an octahedral coordination shell. Most of the anions are bound directly to the cations in both solutions. In contrast, there are only a few Ni–Br nearest neighbors in aq-NiBr2. Instead, cations and anions share hydrating water molecules. Preliminary data show that any ion complexing in aq-RbBr must be weak. These results are in good agreement with published thermodynamic studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.453556
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