Hexa­aqua­dodeca-μ(2)-iodido-octahedro-hexa­tantalum diiodide tetra­hydrate

In the crystal structure of the cluster salt, [Ta(6)I(12)(H(2)O)(6)]I(2)·4H(2)O, the octa­hedral {Ta(6)} cluster core is μ(2-)coordinated by twelve iodido ligands (inner ligand sphere) whereas the six aqua ligands coordinate each at the six outer positions. The discrete, inversion-symmetric cluster complex is double-positively charged, and two iodide anions are present in the crystal structure as counter-ions. In addition, four water mol­ecules are co-crystallized. Hydrogen bonds between the cluster unit, the iodide anions and co-crystallized water mol­ecules stabilize the charge-assisted packing in the crystal structure. [Image: see text]