Dihydrooxathiino-fused unsymmetrical tetrathiafulvalenes

Abstract

The synthesis of three new unsymmetrical tetrathiafulvalenes (TTFs), all fused with dihydrooxathiino rings, is described. The new donors all showed two reversible cyclic voltammetric halfwaves at values lower or similar to the value of bis(ethylenedithio)–TTF. The dimethyl derivative DMOX–TTF, 5, gave well formed radical cation salts of close to 2:1 stoichiometry with several anions.