Abstract
The title compound, C17H15NO2, was prepared as one of two products of the AlCl3/POCl3-catalysed reaction of 9-carbazol-1-ol with 3,3-dimethyacrylic acid. It crystallizes with two crystallographically independent molecules, A and B, which are virtually superimposable but not related by any translational or other pseudosymmetry. Both independent molecules are almost planar [r.m.s. deviations from planarity = 0.053 (1) and 0.079 (1) Å in A and B, respectively] and contain an intramolecular O—H⋯O hydrogen bond. Each type of molecules is connected via pairs of N—H⋯O hydrogen bonds, forming centrosymmetric A 2 and B 2 dimers which are, in turn, arranged in offset π-stacks extending along the a-axis direction. The offset of the dimers and the tilt angle of the molecules allows the formation of alternating C—H⋯π interactions between A and B molecules of parallel stacks.
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