Figure 2
Part of the crystal structure of (I) showing the formation of an R33(20) ring in the (001) sheet by a three-centre N—H⋯(O)2 hydrogen bond. H atoms bonded to C atoms have been omitted for clarity. Atoms marked with an asterisk (*), hash (#) or dollar sign ($) are at the symmetry positions (½ − x, ½ + y, − z), (−½ − x, ½ + y, − z) and (x, 1 + y, z), respectively. |