Hexa-aqua-dodeca-μ₂-iodido-octahedro-hexa-tantalum diiodide tetra-hydrate

In the crystal structure of the cluster salt, [Ta₆I₁₂(H₂O)₆]I₂·4H₂O, the octa-hedral {Ta₆} 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 mol-ecules are co-crystallized. Hydrogen bonds between the cluster unit, the iodide anions and co-crystallized water mol-ecules stabilize the charge-assisted packing in the crystal structure.