Crystal structure of rubidium and cesium tetrafluoroindate(III) dihydrates.

The crystal structures of isostructural fluoride complexes of indium(III) M[InF(HO)] (M = Rb, Cs) crystallizing in the monoclinic system, space group I2/ a, are studied. The structures of M[InF(HO)] (M = Rb, Cs) are formed of isolated centrosymmetric complex [InF(HO)] anions with the trans-position of coordinated HO molecules and Rb, respectively Cs, cations. The In atom in the complex [InF(HO)] anion is surrounded by four F atoms and two oxygen atoms of coordinated HO molecules, forming the coordination polyhedron as a slightly distorted octahedron. Via a system of hydrogen O-H⋯F bonds the polyhedra of In atoms are arranged in a three-dimensional framework with the cations located in its channels. [ABSTRACT FROM AUTHOR]