Synthesis and characterization of a new 3D manganese(II) coordination polymer [Mn2(NDC)2(DMW)2(H2O)]n•nDMF (NDC=2,6-naphthalenedicarboxylate)

A new coordination polymer [Mn-2 (NDC)(2) (DMF)(2) (H2O)](n) . nDMF (1) has been synthesized by the reaction of MnCl2 . 4H(2)O with 2, 6-naphthalenedicarboxylic acids (H2NDC) under ambient conditions in DMF. A single crystal X-ray diffraction measurement reveals that 1 crystallized in the orthorhombic space group Pbca with a = 1.8334(2) nm, b = 1.6046(17) nm, c = 2.3706(3) nm, V = 6.974(13) nm(3), Z = 8, D-c = 1.471 g/cm(3), M-r = 772.50, mu = 0.790 mm(-1), F(000) = 3176, S = 0.951, (Delta/sigma)(max) = 0.001, Deltarho(max) = 0.539, Deltarho(min) = -0.351, R = 0.0335, wR = 0.0859. The combination of octahedral manganese(II) ions and NDC ligands leads to the formation of infinite three-dimensional (3D) networks, which have lozenge-shaped 1D channels (0.7 nm x 1.2 nm) along the crystallographic b-axis. The cavities are filled with coordinated solvent molecules (DMF) and non-coordinated ones.