‘Organic metals’. Isostructural tetrathia- and tetraselena-fulvalene salts of 2,5-diethyltetracyano-p-quinodimethane
Abstract
Replacement of the sulphur atoms in the charge transfer salt tetrathiafulvalene (TTF)–2,5-diethyltetracyano-p-quinodimethane (DETCNQ) with selenium yields the isostructural and better conducting analogue tetraselenafulvalene (TSeF)–DETCNQ, in which the Peierls transition temperature is decreased.