Figure 2
Part of the crystal structure of (IV), showing the formation of the hydrogen-bonded chain of rings along [101]. For the sake of clarity, H atoms bonded to C atoms have been omitted, and only one pair of O atoms, O3A and O3B, is shown. Atoms marked with an asterisk (*), hash (#) or dollar sign ($) are at the symmetry positions ( + x, − y, + z), (1 + x, y, 1 + z) and (x − , − y, z − ), respectively. |