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Abstract
The X-ray crystal structure of octafluorodibenzothiophene is reported. Despite the larger size of fluorine relative to hydrogen there is surprisingly little change in molecular dimensions when the hydrogen atoms of dibenzothiophene are replaced by fluorine. The 3 and 3′ fluorine atoms are closer together (2.549 Å) than the sum of the accepted van der Waals radii. Dibenzothiophene and octafluorodibenzothiophene form a 1:1 crystalline “complex”.