Acta Crystallographica Section E: Crystallographic Communications, cilt.80, sa.Pt 4, ss.423-429, 2024 (ESCI)
In the title molecule, C21H23N3O3, the imidazolidine ring slightly deviates from planarity and the morpholine ring exhibits the chair conformation. In the crystal, N—H O and C—H O hydrogen bonds form helical chains of molecules extending parallel to the c axis that are connected by C—H (ring) interactions. A Hirshfeld surface analysis reveals that the most important contributions for the crystal packing are from H H (55.2%), H C/C H (22.6%) and H O/O H (20.5%) interactions. The volume of the crystal voids and the percentage of free space were calculated to be 236.78 A 3 and 12.71%, respectively. Evaluation of the electrostatic, dispersion and total energy frameworks indicates that the stabilization is dominated by the nearly equal electrostatic and dispersion energy contributions. The DFT-optimized molecular structure at the B3LYP/6-311 G(d,p) level is compared with the experimentally determined molecular structure in the solid state. Moreover, the HOMO–LUMO behaviour was elucidated to determine the energy gap.