Anodic oxidation of bis(pyridine)bis(4-bromo-2,6-dichlorophenoxo)copper(II) complex leads mainly to linear poly(2,6-dichlorophenylene oxide) under constant-potential electrolysis in the dimethylformamide-tetrabutylammonium tetrafluoroborate solvent-electrolyte couple at room temperature under air or nitrogen. Polymerization conditions were based on the peak potentials measured by cyclic voltammetry. Characterization of the polymer was performed by C-13 and H-1 nuclear magnetic resonance, Fourier-transform infra-red spectroscopy, differential scanning calorimetry, molecular-weight and dipole moment measurements.