Abstract
A detailed mechanistic investigation of the reduction of anthracene, 9,10-diphenylanthracene, benzo(a)pyrene and perylene in the presence of CO 2 in N,N-dimethylformamide solutions was carried out using cyclic voltammetry, potential step chronoamperometry and double potential step chronoamperometry. The problem of distinguishing the mechanism among a set of five possible ECE/DISP alternatives was solved in a stepwise fashion involving the three electrochemical techniques together with the necessary theoretical equations. For all systems it was found that the prevailing mechanism is of the DISP1 type with the values of the rate constant for the coupling reaction between CO 2 and the corresponding radical anion having a reasonable correlation with the standard reduction potential of the aromatic hydrocarbon.
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