38 research outputs found
Application of periodic forcing on the simplified Franck-Fitzhugh model for the electrochemical oscillations observed during the electrodissolution of iron in sulphuric acid solutions
Consideration about a voltammogram as the bifurcation diagram of oscillating electrochemical systems: a case study of the copper|1 M trifluoroacetic acid oscillator
Electrochemistry of rhodium and cobalt corroles. Characterization of (OMC)Rh(PPh3) and (OMC)Co(PPh3) where OMC is the trianion of 2,3,7,8,12,13,17,18-octamethylcorrole
The first oxidative electrochemistry of rhodium(III) and cobalt(III) corroles is reported in tetrahydrofuran, N,N-dimethylformamide, benzonitrile, and dichloromethane containing tetrabutylammonium perchlorate as supporting electrolyte. The investigated compounds are represented as (OMC)Rh(PPh3) and (OMC)Co(PPh3) where OMC is the trianion of 2,3,7,8,12,13,17,18-octamethylcorrole. Each complex undergoes up to three oxidations and two reductions depending upon solvent. The oxidations occur at the corrole π-ring system while the reductions occur at the rhodium or cobalt metal center. The three one-electron oxidations are electrochemically reversible by cyclic voltammetry at fast potential scan rates, but several chemical reactions occur at lower scan rates or in the presence of added triphenylphosphine. An overall oxidation reduction mechanism is proposed for each complex and comparisons are made with the well-characterized reactions of cobalt and rhodium tetraphenylporphyrins under the same experimental conditions. © 1992 American Chemical Society