Diaqua-1 Kappa O,2 Kappa O-(2,2 '-Bi-1h-Imidazole-1 Kappa N-2(3),N-3 ')(Oxalato-2 Kappa O-2(1),O-2)Di-Mu-Oxido-Kappa O-4:O-Dioxido-1 Kappa O,2 Kappa O-Dimolybdenum(V) Trihydrate

In the title compound, [Mo-2(C2O4)O-4(C6H6N4)(H2O)(2)]center dot 3H(2)O, the coordination polyhedra for both Mo(V) atoms consist of two bridging O atoms, two atoms of the chelating ligand (oxalate or diimidazole), a terminal O atom and one H2O molecule. The two distorted octahedrally coordinated Mo(V) atoms are linked together via O-O edge-sharing and Mo-Mo interactions with a Mo-Mo bond length of 2.564 (5) angstrom. Uncoordinated water molecules are situated in the voids of the crystal structure. N-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonding between the neutral molecules and the water molecules lead to a consolidation of the structure.