Crystal Structure of New Fluoride Complexes of Indium(III) M[Cu(H2O)4]InF6•nH2O (M = Rb, Cs, NH4; n=0, 1)

Fluoride complexes of indium(III) with mixed monovalent M+ (M = Rb, Cs, NH4) and divalent [Cu(H2O)(4)](2+) cations of the composition M[Cu(H2O)(4)]InF6 center dot nH(2)O (M = Rb, Cs, NH4; n = 0, 1) are synthesized for the first time and their crystal structures with a polymer chain character are studied. The structures of M[Cu(H2O)(4)]InF6 center dot nH(2)O (M = Rb, Cs, NH4; n = 0, 1) are formed of monovalent Rb+, Cs+, NH4 (+) cations respectively, complex [Cu(H2O)(4)](2+) cations, slightly distorted octahedral complex [InF6](3-) anions, and crystallization H2O molecules. By attaching one F atom from the neighboring InF6 groups, the [Cu(H2O)(4)](2+) cations form distorted octahedral Cu(H2O)(4)F-2 groups. Via the bridging F atoms, the [Cu(H2O)(4)](2+) cations and [InF6](3-) anions alternatively join into zigzag anionic polymer chains. A branched system of hydrogen O-H center dot center dot center dot F, O-H center dot center dot center dot O-w, and N-H center dot center dot center dot F bonds arrange the anionic chains into a threedimensional framework in whose voids the monovalent cations and crystallization H2O molecules are located. The structures of M[Cu(H2O)(4)]InF6 center dot nH(2)O (M = Rb, Cs, NH4; n = 0, 1) are a new structure type.