Synthesis and Characterization of a Novel 3D Coordination Polymer Based on Cu(Ⅱ) Cations and Melliti

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A new mellitate complex [Cu3(μ2-mellitate)(μ2-H2O)(H2O)2·H2O]n 1 has been synthesi- zed by the reaction of mellitic acid and Cu(CH3COO)2·H2O in the presence of base. Crystallogra- phic data for 1: C12H80O16Cu3, Mr = 598.80, orthorhombic, Pbcn, a = 8.4378(6), b = 10.0396(7), c = 17.6799(12) A, V = 1497.70(18) A3, Z = 4, Dc = 2.656 g/cm3,μ = 4.327 mm-1, F(000) = 1180, R = 0.0431 and wR = 0.0964 for 1075 observed reflections (Ⅰ> 2σ(Ⅰ)). X-ray crystal structural analysis revealed that the mellitate anions behave as the bridging ligands and link eight copper atoms repeatedly to form a novel three-dimensional metal-organic coordination polymer with two different rhombic tunnels in the solid-state structure.
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