Figure 3
Packing mode of the α-CD dimers in projection on the bc plane. Two adjacent dimers along the b axis are generated by a parallel helicoidal 21 axis. Hydrogen bonds are represented by dashed lines. Two direct hydrogen bonds between primary hydroxyls are shown (O61A—H⋯O64B, top left and bottom right, and O64A—H⋯O61B, bottom left and top right), as well as one direct hydrogen bond between secondary hydroxyls (O21A—H⋯O24A). |