Bis[μ-2-(4-hy­droxy­phen­yl)acetato]-κ(3) O,O′:O;κ(3) O:O,O′-bis­{aqua­(4,4′-bipyridine-κN)[2-(4-hy­droxy­phen­yl)acetato-κ(2) O,O′]samarium(III)} monohydrate

The dinuclear title complex, [Sm(2)(C(8)H(7)O(3))(6)(C(10)H(8)N(2))(2)(H(2)O)(2)]·H(2)O, contains two Sm(III) atoms, six deprotonated p-hy­droxy­phenyl­acetic acid (PAA) mol­ecules, two 4,4′-bipyridine (bipy) mol­ecules, two coordinated water mol­ecules and one solvent water molecule. Each Sm(III)ion is nine-coordinated by seven O atoms from four PAA ligands, one water O atom and one N atom from a bipy ligand in a distorted geometry. The PAA ligands are coordinated to the Sm(III) ion in bridging and bridging tridentate modes. The asymmetric unit also contains one uncoordinated water mol­ecule. The occurrence of numerous O—H⋯O and O—H⋯N hydrogen bonds involving coordinated and non-coordinated water mol­ecules builds up an intricate three-dimensional network.