Raman and far-infrared (FIR) data for iodine-doped substituted polyacetylenes, such as poly(2-propyn-1-ol)-(POHP) and poly(benzyl-propargylamine)-(PBPA) are reported. The data are consistent with an I<sub>5</sub><sup>−</sup>(I<sub>2</sub> . . . I<sub>3</sub>)<sup>−</sup> dopant species in the heavily doped polymers. Solution and solid data provided similar vibrational results. Stability of the polymeric radical cation and the polyiodide anion moiety in tetrahydrofuran is attributed to the solvation effects of the ions by the solvent. New data on heavily doped poly(phenyl)acetylene (PPA) are presented.

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