Dithiaheterocycle-annelated tetrathiafulvalene pi-donors: a structure-property correlation study

Abstract

Single-crystal X-ray structures of BEDT-TTF analogues 3, 6, 7 and 7a along with the preparation of a range of new cation-radical salts derived from these x-electron donors are reported. Physical properties (i.e. colour, cyclic voltammetry data and solid-state conductivities of the derived cation-radical salts) of the donors are discussed in terms of their crystal and molecular structures. The synthesis of compound 7 has been re-investigated. An efficient synthesis of both isomers 7 and 7a along with the other related TTF derivatives is presented. The crystal structure of the precursor thione 10 is also described.