Abstract
The title Schiff base compound, C15H14N2O2, consists of two crystallographically independent molecules, A and B. Molecule A is almost planar, whereas molecule B is slightly twisted, the dihedral angles between the benzimidazole group and the benzene rings being 2.65 (12) and 13.17 (15)°, respectively. The methyl group of molecule B is disordered over two positions, with a refined site-occupancy ratio of 0.581 (7):0.419 (7). In each molecule, intramolecular O—H⋯N hydrogen bonds generate S(6) ring motifs. In the crystal structure, both types of molecules are linked via intermolecular bifurcated N—H⋯O hydrogen bonds into one-dimensional extended chains along [010] and form R 1 2(5) ring motifs. The crystal structure is further stabilized by intermolecular C—H⋯π and π–π interactions [centroid–centroid distances = 3.4758 (16)–3.596 (2) Å].
Highlights
The title Schiff base compound, C15H14N2O2, consists of two crystallographically independent molecules, A and B
Molecule A is almost planar, whereas molecule B is slightly twisted, the dihedral angles between the benzimidazole group and the benzene rings being 2.65 (12) and 13.17 (15), respectively
The methyl group of molecule B is disordered over two positions, with a refined site-occupancy ratio of
Summary
Key indicators: single-crystal X-ray study; T = 100 K; mean (C–C) = 0.004 Å; disorder in main residue; R factor = 0.067; wR factor = 0.151; data-to-parameter ratio = 13.9. Molecule A is almost planar, whereas molecule B is slightly twisted, the dihedral angles between the benzimidazole group and the benzene rings being 2.65 (12) and 13.17 (15) , respectively. The methyl group of molecule B is disordered over two positions, with a refined site-occupancy ratio of. H N hydrogen bonds generate S(6) ring motifs. Both types of molecules are linked via intermolecular bifurcated N—H O hydrogen bonds into one-dimensional extended chains along [010] and form R21(5). The crystal structure is further stabilized by intermolecular C—H and – interactions [centroid–.
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