research papers
In three differently solvated Cu2+ complexes of 1,3-bis(pentafluorophenyl)propane-1,3-dionate, the p-xylene solvent molecules are involved in arene-perfluoroarene interactions with the pentafluorophenyl groups. In a tetrasolvate, two of the p-xylene molecules are located on the coordination CuO4 plane forming a uniform cavity produced by metal interactions.