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Figure 3
The environments of the aromatic rings in the crystal structures of (1)[link]–(4)[link]. (a) Aromatic–aromatic interactions (blue lines) between molecules within the hydrogen-bonded chain [centroid–centroid distance = 4.952 (3) Å] and the interactions (blue lines) between molecules of 21-screw related chains [centroid–centroid distance = 4.985 (2) Å] in the halogenated derivatives (3)[link] and (4)[link]. (b)/(c) The shortest intermolecular contacts (blue lines) from the centroids of the aromatic rings in (1)[link] and (2)[link], respectively. In all three plots, distances are in Ångströms.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 71| Part 10| October 2015| Pages 921-928
doi:10.1107/S2053229615017106
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