Polydiaquabarium(II)-mu(5)-m-phenylenedioxydiacetatol: a three-dimensional barium(II) coordination polymer

摘要

In the title coordination polymer, [Ba(1,3-BDOA)(H2O)(2)](n) (where 1,3-BDOA(2-) is the m-phenylenedioxydiacetate dianion, C10H8O6), each Ba-II ion is ten-coordinated by six carboxyl O atoms and two ether O atoms from different 1,3-BDOA(2-) ligands, as well as by two water molecules, thus defining a dodecahedron. The Ba-II atoms are covalently linked by 1,3-BDOA(2-) ligands in different crystallographic directions, giving rise to a three-dimensional open framework. The crystal structure is further stabilized by hydrogen bonds and pi-pi stacking interactions. In previously studied polymers of this type, the 1,3-BDOA(2-) ligand showed multiple bridging modes with metal ions, including bi-, tri-, tetra- and hexadentate. The title Ba-II complex represents a novel three-dimensional coordination polymer constructed by octadentate bridging 1,3-BDOA(2-) ligands.