Synthesis of novel tetrathiafulvalene derivatives with thiacrowns

Condensation of dicaesium 2-thioxo-1,3-dithiole-4,5-diselenolate(DSIT) with bis-alkylating polythioethers in high dilution leads to the thiacrown compounds 4–7. On treatment with triethyl phosphite, compounds 5–7 are converted into tetrathiafulvalene derivatives 8–10. The crystal structure of 6, and cyclic voltammograms of the tetrathiafulvalenes 9 and 10, are discussed.