Reactivity of electrochemically generated radical cations of alkylnaphthalenes interpreted by AM1 calculations

A New Way for Synthesis of Phenoxazine and Diphenoxazine Derivatives via Electrochemical Method

“…A peak current ratio (I p C1 /I p A1 ) of nearly unity, particularly during the repetitive cycling of potentials may be considered as a criterion for the stability of p-quinone produced at the surface of the electrode under experimental condition. In other words, any hydroxylation [17][18][19][20][21][22] or dimerization [23][24][25] reaction is too slow to be observed on the cyclic voltammetry time-scale.…”

Electro‐organic synthesis of new pyrimidine and uracil derivatives

“…A peak current ratio ( I / I ) of nearly unity can be considered as a criterion for the stability of o ‐quinones ( 2a ) produced at the surface of the electrode under the experimental conditions [9, 10]. In other words, any hydroxylation [11, 12], dimerization [13, 14], or radical cations formation [15–18] are too slow to be observed on the time scale of cyclic voltammetry.…”

“…The coulometry and voltammetry results allow us to propose an EC mechanism[16, 17] for the electro‐oxidation of 1a in the presence of 3a (Scheme ). According to our results, the Michael addition reaction of 3a to o‐ quinone ( 2a ) [eq.…”

Electrosynthesis of novel π-extended benzofuran derivatives of porphyrincatecholes

“…A peak-current ratio ðI C1 p =I A1 p Þ of nearly one, particularly during repetitive recycling of potential, could be considered as a criterion for the stability of o-benzoquinone derivatives of 1b produced at the surface of the electrode under these experimental conditions. It is noteworthy that hydroxylation, ethoxylation [16][17][18], dimerization and polymerization [19][20][21] reactions are too slow to be observed on the time scale of cyclic voltammetry.…”

“…6, curve (I)). This is due to the coupling of monoanionic or dianionic forms of 1b with their oxidized form 2b in a dimerization or polymerization reaction [19][20][21]. The rate of the coupling reaction was pH dependent and enhanced by the increasing of pH.…”