llPolyaniline (PANI), poly(o-toluidine) (POT) and poly(o-chloroaniline) (PO
C) were treated with PdCl2, palladium (II) acetate and palladium (II) acety
lacetonate in organic solvents. It was found that polymer-palladium interac
tions involved predominantly a redox-type reaction which resulted in the pa
rtial oxidation of the polymer chain with simultaneous reduction of some Pd
2(+) to Pd-0. In the systems studied PANI exhibited the strongest redox pro
perties towards Pd2+ ions, POT weaker and POC the weakest ones.