Figure 3.

Arrangement of molecules of 11a in the crystal, where: (a) layer of molecules spreading along (001) plane; (b) general view on layered supramolecular architecture of compound viewed along c-direction (single layers are highlighted in light-green). The H-atoms not involved in intermolecular interactions have been omitted for clarity. The N–H⋯O and C–H⋯O hydrogen bonds are represented by dashed lines, while the C–H⋯π contacts by dotted lines. Symmetry codes: (i) x + 1, y, z; (ii) x − 1, y, z; (iii) x, y, z + 1; (iv) −x + 1, y + 1/2, −z; (v) −x + 1, y − 1/2, −z + 1.