NOVEL S-HETEROQUINOID ELECTRON-ACCEPTORS - SYNTHESIS OF 2,5-BIS(CYANOIMINO)-2,5-DIHYDROTHIENO-[3,2-B]THIOPHENES (DCNTTS) AND CONDUCTIVE CHARGE-TRANSFER COMPLEXES

The 1:1 complex formed from the hetero‐quinoid DCNTT (1, acceptor) and tetrathia‐fulvalene (TTF, donor) exists as a two‐layer conductor with nearly planar acceptor and donor units. Such charge‐transfer complexes show an appreciable single‐crystal conductivity (1 ‐TTF 25, 1·tetramethyltetraselena‐fulvalene 200 S cm−1). Appropriate choice of substituents allows both redox potentials of the acceptor to be varied over a wide range. (Figure Presented.) Copyright © 1990 by VCH Verlagsgesellschaft mbH, Germany