Figure 2
Part of the unit cell of (I), showing the formation of hydrogen-bonded rings. For clarity, H atoms not involved in the hydrogen bonding have been omitted. Dashed lines indicate hydrogen bonds. Atoms labelled with (i), (ii) or a hash (#) are at the symmetry positions (x − , −y + , z − ), (x − , −y + , z + ) and (x − 1, y, z), respectively. |