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Figure 2 Part of the crystal structure of (I), showing the formation of infinite chains, N—H⋯N hydrogen bonds [N6⋯N7i = 3.0379 (15) Å, N9⋯N3ii = 2.8853 (15) Å] and O⋯N non-bonding contacts [N6⋯O1 = 2.9541 (12) Å] (dashed lines). Symmetry codes: (i) 1 − x, 1 − y, −z + 1; (ii) 2 − x, 2 − y, −z + 1. |