Zusammenfassung
The new compounds [K(C12H24O6)][Rb(C12H24O6)](2)Ge-9 center dot 6NH(3), [Rb(C12H24O6)](3)Ge-9 center dot 9NE(3) and [Cs(C12H24O6)](3)Ge-9 center dot 6NH(3) were prepared by the extraction of binary and ternary phases of the nominal composition K2Rb2Ge9, Rb4Ge9 and K2Cs2Ge9 with liquid ammonia in the presence of 18-crown-6. The resulting crystals were characterized by low temperature X-ray ...
Zusammenfassung
The new compounds [K(C12H24O6)][Rb(C12H24O6)](2)Ge-9 center dot 6NH(3), [Rb(C12H24O6)](3)Ge-9 center dot 9NE(3) and [Cs(C12H24O6)](3)Ge-9 center dot 6NH(3) were prepared by the extraction of binary and ternary phases of the nominal composition K2Rb2Ge9, Rb4Ge9 and K2Cs2Ge9 with liquid ammonia in the presence of 18-crown-6. The resulting crystals were characterized by low temperature X-ray structure analysis. All of them contain the 21 electron cluster Ge-9(3-), which is coordinated by alkali metal cations in ion-paired arrangements. The cages were assigned their specific point group symmetry and were compared with hitherto known structures. (c) 2005 Elsevier B.V. All rights reserved.
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