Synthesis and structure of a novel three-dimensional coordination polymer [Cd3(μ3-hmt)2(μ2-C4H2O4)2(H2O)6]SO4·4H2O with (3,4) connected topological motifs (hmt=hexamethylenetetramine)

The self-assembly of Cd(II) ion, hexamethylenetetramine(hmt) and maleate ligand yields coordination polymer [Cd3(μ3-hmt)2(μ2-C4H2O4)2(H2O)6]SO4·4H2O with channels, in which Cd(II) ions intercalate between the two-dimensional wavy layers of polymer, joining them as spacers to give a three-dimensional (3, 4)-connected network of uncommon topological type. Crystal data: Mr=1121.92, space group C2/c, T=298(2) K, a=22.624(3), b=12.6450(10), c=14.735(2) Å, β=94.920(10)°, V=4199.9(9) Å3, Z=4, Dc=1.774 mg/m3, μ=1.639 mm−1, R=0.0579, wR=0.1518.