Download citation
Download citation

link to html
In the asymmetric unit of the title compound, C19H16O2, there are two symmetry-independent mol­ecules (A and B) that differ in the conformation of the ester eth­oxy group. In the crystal, the mol­ecules form inversion dimers via pairs of C—H...O inter­actions. Within the dimers, the anthracenyl units have inter­planar distances of 0.528 (2) and 0.479 (2) Å for dimers of mol­ecules A and B, respectively. Another short C—H...O contact between symmetry-independent dimers links them into columns parallel to [10-1]. These columns are arranged into (111) layers and there are π–π stacking inter­actions [centroid–centroid distances = 3.6446 (15) and 3.6531 (15) Å] between the anthracenyl units from the neighbouring columns. In addition, there are C—H...π inter­actions between the anthracenyl unit of dimers A and dimers B within the same column.

Download citation
Download citation

link to html
In the title mol­ecule, C18H13BrO2, the anthracene unit forms an angle of 46.91 (2)° with the mean plane of the methyl acrylate moiety. In the crystal, the mol­ecules arrange themselves into strands parallel to [010] and, due to the crystal symmetry, there are eight strands crossing the unit cell. In each strand, mol­ecules form short C—H...O and C—H...π contacts and have their anthracene groups parallel to each other. Neighboring strands, related by a c-glide operation, are connected via C—H...O inter­actions and form a layer parallel to (100). The arrangement of the acrylate and anthracene groups in the crystal do not allow for [2 + 2] or [4 + 4] cyclo­addition.

Download citation
Download citation

link to html
In the title mol­ecule, C9H9NO2, the non-H atoms are essentially coplanar with a maximum deviation of 0.027 (2) Å for the C atom of one of the methyl groups. In the crystal, the mol­ecules are arranged into centrosymmetric pairs via pairs of C—H...O and C—H...N inter­actions whereas π–π stacking inter­actions between the benzene rings [centroid–centroid distance 3.91001 (15) Å] organize them into polymeric strands propagating along the a-axis direction. There is a step of 0.644 (2) Å between the two planar parts of the centrosymmetric pair. In neighboring strands related by the n-glide operation, the aromatic rings are tilted by 29.08 (2)°.
Follow Acta Cryst. E
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds