Title of article :
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
Author/Authors :
Sim, Aijia X-ray Crystallography Unit - School of Physics - Universiti Sains Malaysia, Malaysia , Kumar, C. S. Chidan Department of Engineering Chemistry - Vidya Vikas Institute of Engineering & - Technology, Visvesvaraya Technological University, India , Kwong,Huey Chong School of Chemical Sciences - Universiti Sains Malaysia, Malaysia , Then, Li Yee X-ray Crystallography Unit - School of Physics - Universiti Sains Malaysia, Malaysia , Win, Yip-Foo Department of Chemical Science - Faculty of Science - Universiti Tunku Abdul, Rahman, Perak Campus, J Malaysia , Quah, Ching Kheng X-ray Crystallography Unit - School of Physics - Universiti Sains Malaysia, Malaysia , Nave, S. Institution of Excellence - University of Mysore, India , Chandraju, S. Department of Sugar Technology & Chemistry - University of Mysore, Sir M. India , Lokanath, N. K. Department of Studies in Physics - University of Mysore, India , Warad, Ismail Department of Chemistry - Science College - An-Najah National University, Palestinian Territories
Abstract :
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.
Keywords :
bischalcone , methoxyphenyl ring , enone bridge , C—H⋯O hydrogen bond , C—H⋯π interactions , crystal structure
Journal title :
Acta Crystallographica Section E: Crystallographic Communications
