Non-planar bedt-ttf derivatives fused with tetrahydrofuran rings affording cation radical salts with unusual crystal structures

The title non-planar electron donors were prepared by the several steps involving the addition reaction of oligo(1,3-dithiole-trithione) with 2,5-dihydrofuran. They afforded the cation radical salts as single crystals whose unusual crystal structures were revealed by X-ray analysis.