Original packing and unusual molecular conformation of the bis(ethylenedithio)tetrathiafulvalene (ET) donors induced by cation–anion interactions in the radical salt ET5[B10I10]·(CH2Cl2)0.8

The crystal structure of the radical salt ET5[B10I10]·0.8CH2Cl2 has been determined and the packing and molecular conformation of the organic donors are discussed in terms of the C–H⋯I contacts between the ethylene groups of the ET molecules and the iodine atoms of the borane anion [B10I10]2−.