“…14 These observations show that the large stability constants of the copper() substituted benzoate complexes are due to a d → π interaction between the Cu I and the aromatic ring and not to an electrostatic interaction with the carboxylate group. It is of interest that also the stability constant of silver() benzoate 16 is considerably larger than that of the acetate; 15 this result suggests that also the silver-benzoate is a d → π complex.…”