Figure 5
Schematic drawing of polymorphic structures (a) MH1, (b) MH2 and (c) MH3 viewed as in Fig. 4. The symbols representing chains of OH---O bonded molecules with the hydroxyl groups directed upwards off the page are shaded and the chains with the hydroxyl groups downward by open ones. Symmetry elements relating the chains within the ribbons (centres of symmetry) and with the neighbouring ribbons have been indicated. |