Neutral bis(ethylenedithio)tetrathiafulvalene at 100 K

Abstract

The low-temperature crystal structure of bis­(ethyl­enedi­thio)­tetra­thia­fulvalene (BEDT-TTF), C10H8S8, is similar to its high-temperature structure. The room-temperature central bond lengths of this mol­ecule are often used as reference in empirical methods to estimate the charge carried by the (BEDT-TTF)xn+ cations in the BEDT-TTF mol­ecule-based organic conductors. We show that the method we previously reported can still be used with low-temperature BEDT-TTF salts data. Moreover, we confirm the purely thermal origin of the ordering of the ethyl­ene group.