Three Ferrocenyl Thioether Carboxylate-Containing Functional Complexes: Syntheses, Crystal Structures, and Electrochemistry Properties

Three new supramolecular complexes, [Zn(FcCH(2)SCH(2)COO)(2)(H2O)(2)] (1), [Cd(FcCH(2)SCH(2)COO)(2)(H2O)(2)] (2), and [Co(FcCH(2)SCH(2)COO)(2)(H2O)(2)] (3) were synthesized by the reaction of FcCH(2)SCH(2)COOH with Zn(NO3)(2)center dot 6H(2)O, Cd(NO3)(2)center dot 6H(2)O or Co(OAc)(2)center dot 4H(2)O, respectively. These compounds are characterized by single-crystal X-ray diffraction, elemental analysis, and IR spectrum. All these complexes are mononuclear structures, and furthermore, hydrogen-bonding and pi center dot center dot center dot pi stacking interactions link the mononuclears to generate two-dimensional supramolecules. Differential pulse voltammograms of the ligand and the three complexes indicated that all these compounds show three peaks at different potentials, two of which can be assigned to the electron-transfer process of the ferrocenyl moieties and the third may be related to the S atom in them.