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Figure 9
(a) and (b) Single-crystal X-ray structures at 290 K showing 2D halogen-bonded sheets, herringbone packing and TE axes for diazo-I. Disorder in the aromatic rings has been omitted for clarity. Type-II halogen⋯halogen bonds are shown with yellow dashed lines, type-I bonds are shown with blue dashed lines and C—H⋯X bonds are shown with green dashed lines. (c) and (d) Conformational switch in major sites of diazo-I (bottom molecule) between 270 and 250 K. Only the major sites are shown for both molecules.

IUCrJ
Volume 9| Part 1| January 2022| Pages 31-42
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521009593