Redox-state-dependent isomerisation

For the case of two reversible equilibria connecting both electrochemical reaction steps (Eq. 1.30), can be drawn with four reversible processes connecting them. This kind of reaction scheme, the so-called square scheme, is commonly observed for redox-state-dependent isomerisation [110], ligand exchange [111], and protonation... 

For the case of two reversible equilibria connecting both electrochemical reaction steps (Eq. II. 1.30), a scheme with four components. A, A+, B, B", can be drawn with four reversible processes connecting them. This kind of reaction scheme, the so-called square scheme, is commonly observed for redox state dependent isomerisation [110], ligand exchange [111], and protonation processes [112] and can be seen to be based on an extended version of the ECE scheme. Under limiting conditions, when chemical steps are in equilibrium on the voltammetric time scale (with a sufficiently small potential gap between A+/A and b+/b> and appropriately slow scan rate), a simple reversible voltammetric response can be observed even when the square scheme is operative. In other circumstances, two scan rate dependent processes may be observed. 

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See also in sourсe #XX -- [ ]

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