PREPARATION OF ELECTRICALLY CONDUCTIVE HETERO- POLYPHENYLENES

A process for the preparation of electrically conductive hetero-poly-phenylenes, having conductivities greater than 10-2S/cm, wherein from 0.5 to 35 per cent by weight of a strong Lewis acid having a pka of from -10 to +4, preferably AsF5, SbF5, UF6, HCLO4, NO+SbF6-, NO2+SbF6-, NO+AsF6-, NO+PF6-, NO2+PF6-, NO+BF4-, NO2+BF4-, NO+CLO4-, (CF3)2SO4, 2,4,6-trinitrophenol, 2,4,6-trinitrophenyl-sulfonic acid or 2,4,6-trinitrobenzoic acid, is added to a hetero-polyphenylene the absence of moisture and of oxygen.