Abstract
Abstract The redox potentials of the titled complexes, [Bi(pc)X] (pc2− = phthalocyaninate, C32H16N82−, and X = Cl− and Br−), in N,N-dimethylformamide solutions have been determined by cyclic voltammetry for the first time as phthalocyanine complexes of group-15 elements. The voltammograms of [Bi(pc)Cl] consisted of one oxidation (E1/2 = 0.36 V vs. ferrocene/ferricinium+) and two reduction couples (ca. −1.2 and ca. −1.0 V), each of which was a quasi-reversible one-electron process. The voltammograms of [Bi(pc)Br] were quite similar to those obtained with [Bi(pc)Cl], with the exception of the appearance of an additional irreversible anodic peak at 0.30 V, which could be attributable to the oxidation of non-ligand bromide, suggesting the dissociation of [Bi(pc)Br] into [Bi(pc)]+ and Br− in DMF. This is the first case in which [M(pc)X]-type (M = trivalent metal) complex dissociated into [M(pc)]+ and X− in solution.
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