Abstract: | Syntheses and Structure Analyses of Iodocuprates (I). IX. Syntheses and Crystal Structures of Cs3Cu2I5 and RbCu2I3 Cs3Cu2I5 and Rb Cu2I3] were prepared by the reaction of CsI or RbI with CuI in solution (acetonitrile or acetone) or by solid state reaction. The crystal structure analysis of Cs3Cu2I5 (orthorhombic, Pbnm, a = 1438.6(6), b = 1014.7(5), c = 1167.5(5) pm, Z = 4) shows, that the compound contains dinuclear anions Cu2I53? in which the I atoms are arranged to trigonal bipyramids; one CuI occupies one of the two I tetrahedral holes, the other a trigonal site of the neighbouring tetrahedron. Rb Cu2I3] (orthorhombic, Cmcm, a = 1070.6(7), b = 1338.3(8), c = 572.8(3) pm, Z = 4) is built up by CuI4 double chains; the compound is isomorphic with Cs Cu2I3]. |