Poly[[diaquabarium(II)]-μ5-m-phenylenedioxydiacetato]: a three-dimensional barium(II) coordination polymer
Abstract
In the title coordination polymer, [Ba(1,3-BDOA)(H2O)2]n (where 1,3-BDOA2− is the m-phenylenedioxydiacetate dianion, C10H8O6), each BaII ion is ten-coordinated by six carboxyl O atoms and two ether O atoms from different 1,3-BDOA2− ligands, as well as by two water molecules, thus defining a dodecahedron. The BaII atoms are covalently linked by 1,3-BDOA2− ligands in different crystallographic directions, giving rise to a three-dimensional open framework. The crystal structure is further stabilized by hydrogen bonds and π–π stacking interactions. In previously studied polymers of this type, the 1,3-BDOA2− ligand showed multiple bridging modes with metal ions, including bi-, tri-, tetra- and hexadentate. The title BaII complex represents a novel three-dimensional coordination polymer constructed by octadentate bridging 1,3-BDOA2− ligands.
