Figure 2
The hydrogen-bonded layer in (IM), viewed along [100] (top) and [010] (bottom). Thin lines (blue in the electronic version of the paper) denote strong O—H⋯O hydrogen bonds. The centrosymmetric dimers discussed in the Comment are visible in the top figure. H atoms not involved in hydrogen bonding have been omitted. Symmetry codes are as in Table 1. |