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Figure 3
(a) Mol­ecular packing in the (10[\overline{3}]) plane. Dashed lines indicate O—H⋯O hydrogen bonds; C4—H4⋯O1(−x + [{1\over 2}], y + [{1\over 2}], −z + [{1\over 2}]) contacts are indicated by thin dotted lines. Similar arrangements are present in the crystal structures of 3,5-Br and 3,5-Cl (supra­molecular construct S2). (b) Three corrugated sheets stacked in the a-axis direction.

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