| Abstract: | The title compound, Cu2(C4H12N2)2{Ag(CN)2}4(NH3)]·2H2O or Ag4Cu2(CN)8(C4H12N2)2(NH3)]·2H2O, contains two crystallographically different CuII atoms lying on twofold axes. The first Cu atom is hexacoordinated in the form of an elongated tetragonal bipyramid and is part of a plane in which Cu atoms are connected by two bridging diaminobutane molecules Cu—N = 2.033 (4) Å] and two dicyanoargentate anions Cu—N = 2.622 (6) Å]. The ammine ligand stands perpendicular to this plane Cu—N = 2.011 (6) Å] in a trans position to it. Another Ag(CN)2]? anion connects the hexacoordinated Cu atom Cu—N = 1.997 (8) Å] with the second Cu atom Cu—N = 2.026 (7) Å], which is pentacoordinated in the form of a slightly distorted trigonal bipyramid by two monodentate dicyanoargetate anions Cu—N = 2.040 (5) Å]. The axial positions are occupied by two bridging diaminobutane molecules Cu—N = 2.011 (4) Å] that connect the Cu atoms into chains parallel to the above plane. The water molecules remain uncoordinated and thus a unique combination of two‐ and one‐dimensional structures is formed. |
