Abstract
The title compound, C8H4BrNO2·0.5H2O, has a single planar molecule in the asymmetric unit with the non-H atoms having a mean deviation from planarity of 0.028 Å. There is also a half of a water molecule (twofold symmetry) present in the asymmetric unit, which hydrogen bonds with the isatin molecules through O—H...O and N—H...O hydrogen bonds to form a two-dimensional framework in theabplane. There are close Br...O contacts of 2.999 (2) Å to link the layers. The nine-membered rings of the isatin molecules stack along theaaxis with parallel slipped π–π interactions [inter-centroid distances = 3.6989 (19) and 4.1227 (19) Å].
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