Figure 4
Part of the crystal structure of (II), showing the formation of a centrosymmetric aggregate built from N—H⋯O and N—H⋯N hydrogen bonds (dashed lines). For the sake of clarity, C-bound H atoms and the unit-cell outline have been omitted. Atoms marked with an asterisk (*) are at the symmetry position (−x + 2, −y + 1, −z + 1). |