TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Materials: The most preferred oxidizing agent is iron(III) chloride hexahydrate, part of which may be replaced by a salt containing a dopant, e.g. sodium or potassium chloride, but also suitable are e.g. copper(II) chloride, silver nitrate, peroxides, persulfates and permanganates.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The pyrrole is a 3-(alkyl or aryl)-; 3,4-di(alkyl or aryl)- or N-(alkyl or aryl)-pyrrole; 2,2'-bipyrrole or related compounds, optionally as a mixture, which may include unsubstituted pyrrole. (P1) are partially soluble in, especially fully miscible with, water and are used at 10-75vol.% with respect to total water. Preferred (P1) include (m)ethanol, ethylene glycol or its monoethyl ether, N-hydroxyethyl-pyrrolidone and 2-chloroethanol. Benzyl alcohols/phenols have water solubility 0.1-103 g/l and are present at 0.5-3, especially 1, mole per mole pyrrole. Preferred compounds are o-, m- and p-chlorobenzyl alcohol; o-, m- or p-cresols and chlorophenols. Also suitable, at the same molar ratio, are aromatic compounds containing sulfonic or phosphoric acid groups.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The most preferred oxidizing agent is iron(III) chloride hexahydrate, part of which may be replaced by a salt containing a dopant, e.g. sodium or potassium chloride, but also suitable are e.g. copper(II) chloride, silver nitrate, peroxides, persulfates and permanganates.    TECHNOLOGY FOCUS - POLYMERS - Preparation: The concentration of pyrrole is 0.01-1, best 0.25, M and the preferred oxidizing agent:pyrrole mole ratio is 8-12, best 10, :1. The reaction mixture may also include pigments or particles, e.g. graphite, carbon black, microparticles of insulating polymers, oxides etc., preferably at 0.1-75wt.%. Liquid and/or solid additives may be added together with the pyrrole and reaction is at 50 to -40degreesC, with stirring at 10-2000 rpm and reaction time 5-120 minutes. The final product is recovered by filtration, then washed with methanol and dried. EXAMPLE - A solution of iron(III) hexachloride (47.3 g) in N-hydroxyethyl-pyrrolidone (12.5 ml) and water (37.5 ml) was cooled to -5degreesC, then pyrrole (1.2 ml) added, with stirring at 300 rpm. After 30 minutes, the product was filtered off, washed with methanol and dried in vacuo for 24 hours. The yield was 1.34 g (98%, assuming a degree of doping of 33%) and the product had mean electrical conductivity 152 S/cm, after compression for 3 minutes at 300 bars. A similar reaction in absence of N-hydroxyethyl-pyrrolidone gave a yield of only 38% and the product had mean conductivity only 31 S/cm.