Synthesis, Crystal Structure and Properties of the Penta-copper(H)-substituted Sandwich-type Tungstoantimonite [Cu5Na(H2O)4(α-SbW9O33)2]7-

An organic-inorganic hybrid copper-substituted [Cu(EnMe)(2)](1.5){[Cu(EnMe)(2)](2)-[Cu5Na(OH)(4)(alpha-SbW9O33)(2)].5.5H(2)O (I, EnMe = 1,2-diaminopropane) has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. Crystal data for I: C21H75Cu8.50NI4Na075.50Sb2W18, M-r = 5847.83, triclinic, space group P (1) over bar, a = 13.029(3), b = 14.613(3), c = 16.887(4) angstrom, alpha = 72.875(3), beta = 73.893(3), gamma = 74.761(3)degrees, V = 2894.0(10) angstrom(3), Z = 1, S = 1.028, R = 0.0548 and wR = 0.1339. Polyanion I consists of two alpha-SbW9O33 units joined by a cyclic {Cu5Na} cluster. The {Cu5Na} cluster is stabilized by the inorganic 0-donor ligand from both {alpha-SbW9O33} and H2O ligand, in which the two disordered Cu/Na ions pairwisely part the four copper ions to form a centrosyrnmetric quadrangle. In the cluster, two of the copper ions have no terminal water molecules, resulting in a tetragon configuration, while other four have terminal water molecules, leading to the square-pyramidal coordination geometry.