(E)-1-(4-Bromophenyl)-3-(2,4,6-trimethoxyphenyl)prop-2-en-1-oneThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

• Main Authors: Suchada Chantrapromma, Thitipone Suwunwong, Chatchanok Karalai, Hoong-Kun Fun
• Format: Article
• Language: English
• Published: International Union of Crystallography 2009-04-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536809010496

The molecule of the title chalcone derivative, C18H17BrO4, is twisted, the dihedral angle between the 4-bromophenyl and 2,4,6-trimethoxyphenyl rings being 39.17 (6)°. The three methoxy groups are oriented in two different conformations whereby two methoxy groups are coplanar, whereas the third is twisted with respect to the attached benzene ring [C—O—C—C torsion angles of −2.84 (18), −2.80 (18) and −9.31 (18)°]. Weak intramolecular C—H...O interactions generate two S(5) and one S(6) ring motifs. In the crystal structure, molecules are linked into supramolecular sheets parallel to the bc plane by weak C—H...O interactions. These sheets are stacked along the a axis. The crystal structure is further stabilized by weak C—H...π interactions.