Synthesis, crystal structure of coordination polymer [Mn(p-CPOA)(H2O)3]n with 4-carboxylphenoxyacetic acid ligand

The coordination polymer of [Mn(p-CPOA)(H2O)(3)](n) (p-CPOA=4-carboxylphenoxyacetate) was synthesized and characterized by elemental analysis, IR, X-ray single crystal diffraction. The title complex crystallizes in monoclinic with space group P2(1)/c, a=0.699 8(1) nm, b=1.623 5(3) nm, c=1.014 3(2) nm, beta=99.55(3)degrees. V=1.136 5(4) nm(3), Z=4, D-c=1.772 g(.)cm(-3), mu=1.193 mm(-1), F(000)=620, R=0.026 8, wR=0.0745. The manganese atom is seven-coordinate involving four oxygen atoms of different p-CPOA(2-) ligands and three coordinated water, forming a distorted pentagonal bipyramindal environment. Two manganese atoms are bridged by p-CPOA(2-) ligand, forming a one-dimensional zigzag chain structure along b axis. The adjacent distance of (MnMn)-Mn-... atoms is 1.0210 nm. The three-dimensional hydrogen bonding network was formed by the intermolecular hydrogen bonds.