unsymmetrically substituted derivatives bearing one single chiralbinaphthol substituent on one side were also prepared in their enantiopure (R) and (S) forms and as racemic mixture. X-ray crystal structure determinations of different donor molecules show that the TTF tend to associate into face-to-face dyads with a strong folding of the dithiole rings along the S⋯S hinge while the binaphthol moieties adopt a