Organic Electrode Reactions - Fundamentals and Applications of Organic Electrochemistry - page 125

Figure 5.3 Electrochemical

fluorodesulfurization using hypervalent

iodobenzene derivative mediator

Anodic α-fluorination of α , γ -diketones and
α -ketoesters can be also achieved using
p -iodotoluene as a mediator [11].

5.1.2.6 Electrosynthesis Using Transition
Metal Complex Mediators

Transition metal complex mediators have
various reactivities and many advantages. Their
redox potentials and the selectivity of the
desired reaction can be controlled by changing
ligand. Their synthetic application is mainly
based on the reactivity of the low valent state
generated by cathodic reduction of the
mediators [2]. Typically, Co(III) complex
(vitamin B 12 ) is readily reducible, optically
active, non-toxic and inexpensive. It is reduced
at −0.9 V vs. SCE to form Co(I) complex, which
undergoes oxidative addition to alkyl halide to
form alkyl Co(III) complex as an intermediate.
The resulting intermediate is reduced at more