An interesting fourfold interpenetrating network constructed by polyoxometalates and metal-organic coordination complexes:: [Cu5I(bpy)5(H2O)2] [[CuII(H2O)3]2CuII[P4MoV6O25(OH)6]2]•H3O+.2H2O

A novel fourfold interpenetrating 3D network compound, [Cu-5(I)(bpy)(5)(H2O)(2)][[Cu-II(H2O)(3)](2)Cu-II [(P4Mo6O25)-O-V(OH)(6)](2)]center dot H3O+center dot 2H(2)O 1 (bpy = 4,4'-bipyridine), has been synthesized and characterized by elemental analyses, IR, TG analyses, and single-crystal X-ray diffraction. Compound 1 is built up of Cu[P4Mo6O25(OH)(6)](2) clusters covalently linked by Cu-bpy coordination polymer chains to yield unusual two-dimensional layers, which are further connected together by metal coppers to produce an interesting fourfold interpenetrating 3D network structure. The crystal data for compounds 1: Triclinic, space group P (1) over bar, a = 12.714(3) angstrom, b = 14.882(3) angstrom, c = 15.369(3) angstrom, alpha = 72.74(3)degrees, beta = 72.12(3)degrees, gamma = 65.62(3)degrees, V = 2471.9(9) angstrom(3), Z = 1. (c) 2007 Elsevier B.V. All rights reserved.