Tetra-kis(-4-methoxy-benzoato)bis-[(4-methoxy-benzoato)(1, 10-phenan-throline)terbium(III)]

Abstract

In the title dinuclear complex, [Tb2(C8H7O 3)6(C12H8N2)2], each TbIII ion is eight-coordinated by two N atoms from a 1,10-phenanthroline ligand and six O atoms from the carboxyl-ate groups of five 4-methoxy-benzoate ligands in a distorted square-anti-prismatic geometry. All six 4-methoxy-benzoate ligands act in a bidentate mode, two coordinating to one Tb center each and the other four bridging two Tb centers [Tb⋯Tb separation = 4.3144 (6) Å]. In the crystal, inter-molecular π-π inter-actions between the aromatic rings of 1,10-phenanthroline and 4-methoxy-benzoate ligands [centroid-centroid distance = 3.742 (9) Å] link two mol-ecules into a centrosymmetric dimer. Weak inter-molecular C- H⋯O hydrogen bonds help to consolidate the crystal packing.