The hydrothermal reaction of Cu-II salts with 1,2,4-triazole (Htrz) in aqueous ammonia yielded a novel metal organic framework {[Cu-3(mu(3)-O)(mu(3)-O)(3)(OH)(H2O)(6)]}(n) (1), which was characterized by single-crystal X-ray diffraction, X-ray powder diffraction, thermogravimetric analysis, IR, and variable-temperature magnetic susceptibility. It crystallizes in cubic, space group Fd (3) over barc with a = 24.644 (3) angstrom, V = 14967(3) angstrom(3), and Z = 96. Its framework is the first 3D structure using coordinative interactions constructed via trinuclear triangular CuII secondary building units, in which both Cu-II ions and trz ligands act as three-connected nodes to form a 6.8(2) net. An overall antiferromagnetic behavior was found in the compound.
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