Supramolecular adduct of tetrachlorogallate with cucurbituril: (H7O3)(4)[GaCl4](2)Cl-2 center dot C36H36N24O12 center dot 2H(2)O

During the investigation of the Ga3+-HCl-cucurbituril system, we prepared c rystals of the title compound, tetrakis(hydroxonium) bis(tetrachlorogallate ) dichloride cucurbituril decahydrate, by slow evaporation of an aqueous hy drochloric solution containing Ga3+ and cucurbituril at room temperature in air. The compound appeared to be isostructural with the cucurbituril tetra chloroferrate(III) adduct. The structure contains H7O3+ cations, [GaCl4](-) anions, cucurbituril and water molecules. The centres of the cucurbituril molecules are arranged as body-centered packing and [GaCl4](-) anions are s ituated in space between them. There is a complicated network of hydrogen b onds in the structure.