DITHIAHETEROCYCLE-ANNELATED TETRATHIAFULVALENE PI-DONORS - A STRUCTURE-PROPERTY CORRELATION STUDY

Single-crystal X-ray structures of BEDT-TTF analogues 3, 6, 7 and 7a a long with the preparation of a range of new cation-radical salts deriv ed from these x-electron donors are reported. Physical properties (i.e . colour, cyclic voltammetry data and solid-state conductivities of th e derived cation-radical salts) of the donors are discussed in terms o f 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 cry stal structure of the precursor thione 10 is also described.