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Pyrrole has been incorporated into the channel-like cavities of polymers of the type: [(Me3Sn)3FeIIIxCoIII1-x(CN)6] with 0 < x ≤ 1. The resulting black composites involving polypyrrole (Ppy) and Fe(II) display electrical conductivities σ between ca. 10-5 and 10-1 S · cm-1. Usually, composites prepared in the presence of small amounts of H2O exceed those in conductivity resulting under strictly anhydrous conditions owing to notably lower thermal activation energies (0.04 to 0.08 eV). Andoi:10.1515/znb-1993-1115 fatcat:7iqhuo2wijgrfmgj5v37oa7xf4