Three closely related (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(methoxyphenyl)prop-2-en-1-ones]: supramolecular assemblies in one dimension mediated by hydrogen bonding and C—H...π interactions

• Main Authors: Aijia Sim, C. S. Chidan Kumar, Huey Chong Kwong, Li Yee Then, Yip-Foo Win, Ching Kheng Quah, S. Naveen, S. Chandraju, N. K. Lokanath, Ismail Warad
• Format: Article
• Language: English
• Published: International Union of Crystallography 2017-06-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: crystal structure; bischalcone; methoxyphenyl ring; enone bridge; C—H...O hydrogen bond; C—H...π interactions
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989017007460

In the title compounds, (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(2-methoxyphenyl)prop-2-en-1-one], C26H22O4 (I), (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(3-methoxyphenyl)prop-2-en-1-one], C26H22O4 (II) and (2E,2′E)-3,3′-(1,4-phenylene)bis[1-(3,4-dimethoxyphenyl)prop-2-en-1-one], C28H26O6 (III), the asymmetric unit consists of a half-molecule, completed by crystallographic inversion symmetry. The dihedral angles between the central and terminal benzene rings are 56.98 (8), 7.74 (7) and 7.73 (7)° for (I), (II) and (III), respectively. In the crystal of (I), molecules are linked by pairs of C—H...π interactions into chains running parallel to [101]. The packing for (II) and (III), features inversion dimers linked by pairs of C—H...O hydrogen bonds, forming R22(16) and R22(14) ring motifs, respectively, as parts of [201] and [101] chains, respectively.