Crystal structure of 2-(5-bromo-2-hydroxybenzylidene)-2,3-dihydro-1H-indene-1,3-dione
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چکیده
The title mol-ecule, C16H9BrO3, deviates slightly from planarity. The benzene ring makes a dihedral angle of 1.02 (9)° with the plane defined by the five-membered ring of the indandione moiety. The latter exhibits a minute twist indicated by the dihedral angle of 0.47 (9)° between the planes of the five- and six-membered rings. An intra-molecular C-H⋯O hydrogen bond between the attached benzene ring with one of the indandione carbonyl O atoms stabilizes the mol-ecular conformation. In the crystal, the mol-ecules form dimers across centres of inversion via pairwise O-H⋯O hydrogen bonds. The dimers form stacks running parallel to [010] and inter-act through π-π inter-actions between the five-membered ring of one mol-ecule and the six-membered rings of the indandione moiety of an adjacent mol-ecule [centroid-to-centroid distance = 3.5454 (10) Å].
منابع مشابه
Crystal structure of 2-hydroxy-2-(2-oxocycloheptyl)-2,3-dihydro-1H-indene-1,3-dione
In the title compound, C16H16O4, the five-membered ring of the indene-1,3-dione unit adopts a twist conformation, whereas the seven-membered ring adopts a twist-chair conformation. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, weak C-H⋯O hydrogen bonds and π-π stacking [centroid-to-centroid distance = 3.7373 (8) Å] into a three-dimensional supra-molecular architecture.
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