Figure 6
Packing of compound 4′ viewed edge-on to the layer structure (projected parallel to the b axis; the layers lie horizontally), thus showing the role of the dioxanes 1 and the hydrogen bond H25⋯O6 in bridging the layers. Hydrogen bonds H27A⋯O3, which also connect the layers, are not shown; they are formed at the points where C27 of one layer projects into the next layer and lie almost parallel to the view direction. |