SYNTHESIS AND CRYSTAL-STRUCTURE OF A NEW UNSYMMETRICAL OXYGEN-CONTAINING TTF

Many chalcogen-substituted derivatives of tetrathiafulyalene (TTF) are able to form metallic or even superconducting cation radical salts. T he particular properties of bis(ethylenrdithio)TTF (ET) prompted the s ynthesis of nerv oxygen-containing analogues of ET. One such new molec ule, ETOX, is presented, which, besides being a new pi-donor, is the f irst mono-era derivative of ET. Et is shown to be a promising donor fo r molecular metals and superconductors that gives cation radical salts with a variety of stoichiometries.