text: The hexahydrate consists of octahedral  cation centers and chloride anions () as counterions. Hydrogen bonds link the cation and anions.
  The hydrated form of aluminium chloride has an octahedral molecular geometry, with the central aluminium ion surrounded by six water ligand molecules. Being coordinatively saturated, the hydrate is of little value as a catalyst in Friedel-Crafts alkylation and related reactions.