1,1′-(Ethane-1,2-diyl)bis(indoline-2,3-dione)

• Main Authors: Yao Wang, Sheng-Li Cao, Chong-Qing Wan, Jing-Li Yuan
• Format: Article
• Language: English
• Published: International Union of Crystallography 2010-07-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536810018957

The molecule of the title compound, C18H12N2O4, is situated on a crystallographic centre of symmetry. The molecule has a zigzag structure, with two parallel symmetry-related indoline-2,3-dione fragments linked by an ethylene group at each N atom. In the crystal, the molecules stack in columns along the b axis. There are two such columns in the structure. The molecules within each column are parallel; however, the molecules in the two columns differ in the respective orientation of the indoline-2,3-dione fragments. In one column, they are approximately parallel to (112), while in the other they are approximately parallel to (overline{1}12). The interplanar angle between the indoline-2,3-dione fragments in the two columns is 80.83 (3)°. The molecules within each column are related by mutual displacement of their centres of symmetry, that is (0, ±1/2, ±1/2). The packing between the molecules is provided by weak interactions only, viz. C—H...O hydrogen bonds and π–π [centroid–centroid distance = 3.8745 (8) Å] and C=O...π interactions.