Zusammenfassung
The new compounds [K(C18H36N2O6)](2)Ge-5 center dot 4NH(3) (1) and [Rb(C18H36N2O6)](2)Ge-5 center dot 4NH(3) (2) were prepared by the extraction of a binary phase of the nominal composition KGe1.67 and a ternary phase of the composition Rb0.5Cs0.5Ge2.25 With liquid ammonia in the presence of cryptand [2.2.2]. The resulting crystalline materials were characterized by low temperature X-ray ...
Zusammenfassung
The new compounds [K(C18H36N2O6)](2)Ge-5 center dot 4NH(3) (1) and [Rb(C18H36N2O6)](2)Ge-5 center dot 4NH(3) (2) were prepared by the extraction of a binary phase of the nominal composition KGe1.67 and a ternary phase of the composition Rb0.5Cs0.5Ge2.25 With liquid ammonia in the presence of cryptand [2.2.2]. The resulting crystalline materials were characterized by low temperature X-ray structure analysis. Compounds 1 and 2 contain isolated trigonal-bipyramidal Ge-5(2-) cage anions, the symmetries of which were investigated and compared to the previously reported pentagermanide anion. Despite the nearly identical formulae, the two compounds are not isotypic, as the space group type changes from the acentric group P1 (no. 1) for the potassium compound to P (1) over bar (no. 2) for the rubidium compound.
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