Venkat R. Thalladi, Roland Boese, Sophie Brasselet, Isabelle Ledoux, Joseph Zyss, Ram K. R. Jetti and Gautam R. Desiraju
The ability of CH3 groups to form helical chains of C–H‥π interactions with phenyl rings leads to polar stacking of trigonal octupolar networks in a substituted triazine, and therefore to three-dimensional non-centrosymmetry.