Acta Cryst. (2012). B68, 661-666 [ doi:10.1107/S0108768112036191 ]
Abstract: The crystal structures of four polymorphs of the pesticide dithianon (5,10-dihydro-5,10-dioxonaphtho[2,3-b]-1,4-dithiine-2,3-dicarbonitrile) have been solved from powder diffraction data and refined using the Rietveld method. Three polymorphs crystallize in non-centrosymmetric space groups. Two polymorphs have Z' > 1. The structures are assembled via interactions between carbonyl groups of quinoid fragments into layers which further interact only by weak interactions.
Keywords: polymorphism; dithianon; X-ray powder diffraction; structure solution; carbonyl interactions.
Rietveld powder data file (CIF format) (205.9 kbytes)
Rietveld powder data file (CIF format) (174.5 kbytes)
Rietveld powder data file (CIF format) (149.6 kbytes)
Rietveld powder data file (CIF format) (88.7 kbytes)
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