[Rb(18-crown-6)][Rb([2.2.2]-cryptand)]Rb2Sn9 x 5NH3

Abstract

The crystal structure of the title compound, poly[[(4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane)rubidium] [[(1,4,7,10,13,16-hexaoxacyclooctadecane)rubidium]di-[mu]-rubidium-[mu]-nonastannide] pentaammonia], n represents the first ammoniate of a Zintl anion together with two different chelating substances, namely 18-crown-6 and [2.2.2]-cryptand. The involvement of these large molecules in the crystal structure of [Rb(18-crown-6)][Rb([2.2.2]-cryptand)]Rb2Sn9·5NH3 leads to the formation of a new structural motif, namely one-dimensionally extended double strands running parallel to [100] and built by Sn94- cages and Rb+ cations. The double strands are shielded by 18-crown-6 and [2.2.2]-cryptand. The cations are additionally coordinated by ammonia molecules. One of the four independent Rb+ cations is disordered over two sets of sites in a 0.74 (2):0.26 (2) ratio.