Abstract The syntheses and structures of 1, 3-dithiole and tetrathiafulvalene derivatives of benzoquinone have been investigated. This work extends earlier investigations of naphthoquinone analogues. The X-ray structures, NMR, IR, UV, mass spectra, and E 0 1/2 values from cyclic voltammetry measurements are reported. Ab initio STO-6-31G calculations are used to correlate the cyclic voltammetry and UV data for selected ...