title: Crystal structures of (2E)-1-(3-bromo-thio-phen-2-yl)-3-(2-meth-oxy-phen-yl)prop-2-en-1-one and (2E)-1-(3-bromo-thio-phen-2-yl)-3-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one.
abstract: In the mol-ecules of the title compounds, (2E)-1-(3-bromo-thio-phen-2-yl)-3-(2-meth-oxy-phen-yl)prop-2-en-1-one, C14H11BrO2S, (I), which crystallizes in the space group P-1 with four independent mol-ecules in the asymmetric unit (Z' = 8), and (2E)-1-(3-bromo-thio-phen-2-yl)-3-(3,4-di-meth-oxy-phen-yl)prop-2-en-1-one, C15H13BrO3S, (II), which crystallizes with Z' = 8 in the space group I2/a, the non-H atoms are nearly coplanar. The mol-ecules of (I) pack with inversion symmetry stacked diagonally along the a-axis direction. Weak C-H⋯Br intra-molecular inter-actions in each of the four mol-ecules in the asymmetric unit are observed. In (II), weak C-H⋯O, bifurcated three-center inter-molecular inter-actions forming dimers along with weak C-H⋯π and π-π stacking inter-actions are observed, linking the mol-ecules into sheets along [001]. A weak C-H⋯Br intra-molecular inter-action is also present. There are no classical hydrogen bonds present in either structure.
authors.affiliation: Department of Physics, Government First Grade College, Kumta 581 343, India, Research and Development Centre, Bharathiar University, Coimbatore 641 046, India.
authors.forename: Vasant S
authors.initials: VS
authors.lastname: Naik
authors.affiliation: Department of Physics, Gokhale Centenary College, Ankola 581 314, India, Research and Development Centre, Bharathiar University, Coimbatore 641 046, India.
authors.forename: Venkataraya
authors.initials: V
authors.lastname: Shettigar
authors.affiliation: Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
authors.forename: Tyler S
authors.initials: TS
authors.lastname: Berglin
authors.affiliation: Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
authors.forename: Jillian S
authors.initials: JS
authors.lastname: Coburn
authors.affiliation: Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA.
authors.forename: Jerry P
authors.initials: JP
authors.lastname: Jasinski
authors.affiliation: Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysuru 570 006, India.
authors.forename: Hemmige S
authors.initials: HS
authors.lastname: Yathirajan
keywords: C—H⋯π inter­actions; bromo­thio­phene; crystal structure; meth­oxy­phenyl­prop-2-en-1-one; mol­ecular conformation; nearly coplanar mol­ecules; π–π sacking inter­actions