ELECTROCHEMICAL AND SPECTROSCOPIC STUDIES OF CO(CREATININE)_2Cl_2

摘要

The electrochemical behavior of Co(creatinine)_2Cl_2 was investigated by cyclic voltammetry in organic solvents (DMSO and DMF) and in aqueous solution. Analysis of the results indicates that the electroactive species depend on the nature of the solvent. In DMF a single reduction process Co(II)/Co(I) is observed. In DMSO the redox behavior of the complex changes with the scan rate and a two-electron transfer process can be eventually observed. In aqueous solution the complex immediately decomposes giving rise to the aqua-cation. The characteristic peak of the redox couple Cl_2/Cl~- is observed as a consequence of the chloride released from the coordination sphere. Analysis of the electronic spectra gave additional support to the proposed mechanisms. The Co-Cl and Co-N stretching bands were clearly identified in the low frequency region of the IR spectrum.