| Summary: | In the title compound, [La(C7H5O4)3(C12H8N2)3(H2O)2]·C12H8N2, the LaIII atom is coordinated by four N atoms from two chelating 1,10-phenanthroline (phen) ligands, four O atoms from three 2,6-dihydroxybenzoate (DHB) anions (one monodentate, the other bidentate) and two water O atoms, completing a distorted LaN4O6 bicapped square-antiprismatic geometry. Within the mononuclear complex molecule, intramolecular π–π stacking interactions are observed, the first between a coordinated phen molecule and a DHB ligand [centroid–centroid distance = 3.7291 (16) Å], and the second between a coordinated phen molecule and an uncoordinated phen ligand [centroid–centroid distance = 3.933 (2) Å]. Intermolecular π–π stacking is observed between adjacent complexes [interplanar distance = 3.461 (3) Å]. Intra- and intermolecular O—H...O hydrogen bonds are observed in the DHB ligands and between a water molecule and DHB ligands, respectively. O—H...N hydrogen bonds are also observed in the DHB ligands and between uncoordinated phen molecules and aqua ligands.
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