(E)-1-(2-Thienyl)-3-(3,4,5-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: Thitipone Suwunwong, Suchada Chantrapromma, Paradorn Pakdeevanich, Hoong-Kun Fun
• Format: Article
• Language: English
• Published: International Union of Crystallography 2009-07-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536809021850

The molecule of the title heteroaryl chalcone, C16H16O4S, which consists of substituted thiophene and benzene rings bridged by the prop-2-en-1-one group, is slightly twisted. The dihedral angle between the thiophene and 3,4,5-trimethoxyphenyl rings is 12.18 (4)°. The three methoxy groups have two different conformations; two methoxy groups are coplanar [C—O—C—C torsion angles = −1.38 (12) and 0.47 (12)°] whereas the third is (-)-synclinal with the benzene ring. In the crystal structure, adjacent molecules are linked in a face-to-side manner into chains along the c axis by weak C—H...O(enone) interactions. These chains are stacked along the b axis by weak C—H...O(methoxy) interactions.