The title compound, C15H14N2O3, was prepared by condensation of 2-hydroxy-5-methyl-benzaldehyde and 2-methyl-3-nitro-phenylamine in ethanol. The configuration of the C N bond is E. An intramolecular O-H… N hydrogen bond is present, forming an S(6) ring motif and inducing the phenol ring and the Schiff base to be nearly coplanar [C-C-N-C torsion angle of 178.53 (13)◦]. In the crystal, molecules are linked by C-H\...O interactions, forming chains along the b-axis direction. The Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H…H (37.2%), C…H (30.7%) and O…H (24.9%) interactions. The gas phase density functional theory (DFT) optimized structure at the B3LYP/ 6-311 G(d,p) level is compared to the experimentally determined molecular structure in the solid state. The HOMO-LUMO behaviour was elucidated to determine the energy gap.
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Cinar, E. B., Serajul Haque Faizi, M., Yagci, N. K., Dogan, O. E., Aydin, A. S., Agar, E., … Mashrai, A. (2020). Crystal structure, Hirshfeld surface analysis and DFT studies of (E)-4-methyl-2-{[(2-methyl-3-nitro-phenyl)imino]methyl}phenol. Acta Crystallographica Section E: Crystallographic Communications, 76, 1551–1556. https://doi.org/10.1107/S2056989020011652