Planar {Ni6} Cluster-Containing Polyoxometalate-based Inorganic–Organic Hybrid Compound and Its Extended Structure

Two {Ni6} cluster-containing inorganic–organic hybrid compounds have been successfully synthesized in the presence of organic amine under hydrothermal conditions, and they were characterized by powder and single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, and IR spectroscopy. Structural analysis indicates that [Ni0.5(H2O)3]­[{Ni6(μ3-OH)3­en­(H2O)10}­(H2P2W15O56)]·10H2O (1, en = ethylenediamine) is a triangular inorganic {Ni6} cluster substituted polyoxotungstate with only one en to stabilize the {Ni6} cluster. However, [Ni­(dap)2]­{[Ni1.5(dap)1.5­(H2O)3]­[Ni6(μ3-OH)3­(dap)2(en)­(H2O) ​{O2C­(CH2)2CO2}0.5­(CH3COO)­(P2W15O56)]}·​15H2O (2, dap = 1,2-diaminopropane) is a three-dimensional inorganic–organic hybrid compound linked by succinic acid. The magnetic properties of both compounds were studied. In addition, the adsorption properties of compound 2 have also been investigated.