Kristallstruktur des „supramolekularen”︁ Komplexes [Cs2(18-Krone-6)][HgI4] mit ungewöhnlich koordinierten Cs-Ionen

Crystal Structure of the “Supramolecular” Complex [Cs₂(18-crown-6)][HgI₄] with Unusually Coordinated Cs Ions The reaction of 18-crown-6, 1,4,7,10,13,16-hexaoxacyclooctadecane, with HgI₂/CsI in methanol yields crystals of [Cs₂(C₁₂H₂₄O₆)][HgI₄]. The compound crystallizes monoclinically, space group P2₁/c, Z = 4, a = 1574.8(3), b = 1067.0(3), c = 1693.2(6) pm, and β = 98.29(3)º. The structure consists of a network made up of two different types of [Cs-(18-crown-6)-Cs]²⁺ cations, interconnected by [HgI₄]^2? anions. The cations form an “anti-sandwich” structure with relatively short Cs ? Cs distances of 382 pm in the first type of cations and a longer distance of 480 pm in the second type of cations.