Über polyarylenalkenylene und polyheteroarylenalkenylene, 13. Synthesen und charakterisierung von poly (dithieno[3,2-b: 2′, 2′,3′-d]thiophen-2, 6-diylvinylenarylenvinylen)en und einigen modellverbindungen†

From Witting-reactions of dithieno[3,2-b: 2′, 3′-d]thiophene-2, 6-dicarboxaldephyde (1) with “mono-and bis-Wittig-salts” of the benzene and thiophene series poly(dithieno[3,2-b: 2′,3′-d]-thiophene-2,6-diylvinylenearylenevinylene)s 3a—c and some model compounds 5a—c were obtained. Wittig-reactions of dithieno[3,2-b: 2′,3-d]thiophene-2-carboxaldehyde (6) with “mono-and bis-Wittig-salts” gave model compounds 7a—c and 8a, c. The structures of all compounds were confirmed by elements analyses, IR-and electronic spectra, those of the model compounds additionally by mass spectra, and in case of sufficient solubility by 1 H NMR spectra. The electrical conductivities of all compounds and the thermooxidactive degradation of the polymers 3a, c were investigated.