Synthesis of aza-analogues of poly(isothianaphthene)

The reaction of phthalic anhydride with phosphorus pentasulfide which gives poly(isothianaphthene) (PITN) has been extended to some other anhydrides a nd its derivatives (phthalimides and phthalhydrazide). The reaction with an hydrides leads to polymers, while the reaction with other derivatives can l ead to thio, dithio compounds or polymers. Contrary to theoretical predicti ons, aza-analogues of PITN do not seem to have better electrical properties . The most conductive is polyisoindol with conductivity of 10(-4) S/cm, whi ch is still 100 times lower than PITN synthesized under similar conditions. (C) 1999 Elsevier Science S.A. All rights reserved.