Method for chemically modifying a metal complex

A method for producing a chemically modified coordination compound, which comprises removing by chemical means the central metal from the chemically modified metal complex obtained from an anionic metal complex insoluble in a non-aqueous solvent and a clathrate compound, a clathrate complex of said clathrate compound with a counter of cation of said anionic metal complex, which is soluble in a non-aqueous solvent, and then reacting functional groups of said metal complex, which are not concerned with the coordination of said metal complex, with an organic reagent in the presence of a reaction assistant, wherein the functional groups which are not concerned with the coordination of said metal complex, are hydroxyl groups, amino groups, ketone groups, epoxy groups, isocyanato groups, ester groups or amido groups.