Figure 6
The crystal structure of (II), showing the six molecules in the asymmetric unit. Dashed lines indicate hydrogen bonds. (In the electronic version of the paper, the colour code is: molecule A black, molecule B red, molecule C green, molecule D blue, molecule E yellow and molecule F orange.) Ladder-like arrangements are formed, with the sequence of molecules C, D and E connected between the struts of the ladder sequence of molecules A, B and F. |