Synthesis and crystal structure of a new organic metal with honeycomb dithiooxalato-bridged anionic network, β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)}

The first bis(ethylenedithio)tetrathiafulvalene (ET) based radical cation salt with a bimetallic dithiooxalato-bridged anionic network, β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been prepared. The compound is metallic down to 60 K, at lower temperatures the resistance grows smoothly. The structure of β″-(ET)2{[NMe3Ph]NaCr(C2S2O2)3(MeCN)} has been determined from single-crystal X-ray diffraction and is characterized by alternation a conducting donor layer of the β″-type packing with three insulating layers, two of which are {[NaCr(dto)3]2−}∞ anionic networks and the third one, interleaving them, is formed by [NMe3Ph]+organic cations and acetonitrile solvent molecules.