Synthesis and Characterizations of 1-D Double-Chain Manganese Coordination Polymer [Mn(ncpo)(H2O)3]n

Abstract

A 1-D double-chain manganese coordination polymer constructed by 2-nitro-4-carboxylphenoxy acetic acid has been synthesized by phase diffuse method. The crystal structure has been determined by X-ray diffraction. The crystal is monoclinic, space group C_c with a = 9.647(10), b = 25.46(3), c = 6.560(7) Å, β = 131.741(11)°, MnC₉H₁₁NO₁₀. M_r = 348.13, V = 1202(2) ų, D_c = 1.923 g/cm³, F(000) = 708, μ = 1.156 cm^-1 and Z = 4. The final refinement gave R = 0.0695 and wR = 0.1755 for 1307 reflections with I > 2σ(I). The coordination polymer demonstrates 1-D double-chain structure along a axis and it is connected to 3-D supramolecular network by hydrogen bonds. Except for hydrogen bonds, there exist π-π stacking interactions among benzene rings. The complex begins to lose water molecules at 433 K and when it is heated to 693 K, it will lose nitro group and oxyacetate radical.