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Tris[(1,4,7,10,13,16-hexaoxacyclooctadecane)rubidium] heptaantimonide–ammonia (1/4)

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Author(s): Fabian Mutzbauer | Nikolaus Korber

Journal: Acta Crystallographica Section E
ISSN 1600-5368

Volume: 67;
Issue: 11;
Start page: m1551;
Date: 2011;
Original page

ABSTRACT
The crystal structure of the title compound, [Rb(C12H24O6)]3[Sb7]·4NH3, fills the gap between the already known Zintl anion ammoniates {[Cs(18-crown-6)]3Sb7}2·9NH3 [Wiesler (2007). Dissertation, Universität Regensburg, Germany] and [K(18-crown-6)]3Sb7·4NH3 [Hanauer (2007). Dissertation, Universität Regensburg, Germany]. As in the two known compounds, the antimony cage anion in this crystal structure is coordinated by three alkali cations. The coordination spheres of each of the cations are saturated by 18-crown-6 molecules. The ammonia molecules of crystallization are situated between the crown ethers. The neutral, molecular [Rb(18-crown-6)]3Sb7 units are interconnected by multiple dipole–dipole interactions between ammonia and 18-crown-6.
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