In the crystal structure of the cluster salt, [Ta6I12(H2O)6]I2·4H2O, the octa-hedral {Ta6} cluster core is μ2-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.
Keywords: crystal structure; iodide; metal cluster; tantalum.
© Schröder and Köckerling 2021.