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Figure 2 The unit-cell content of [Rb(18-crown-6)][Rb([2.2.2]-cryptand)]Rb2Sn9 × 5NH3 shows the separation of the strands by [2.2.2]-cryptand molecules around Rb11; the coordination spheres of the Rb cations are saturated by ammonia molecules. H atoms of 18-crown-6 and [2.2.2]-cryptand are omitted; ellipsoids of all non-hydrogen atoms are given with a probability factor of 50%. |