biostudies-literatureUnknown78(Pt 4)Yennawar HPThe crystal structure of racemic (R/S,E)-2-(4-hy-droxy-phen-yl)-4-(2-phenyl-hydrazin-1-yl-idene)chromane-5,7-diol ethanol monosolvate, C21H18N2O4·C2H6O, in a centrosymmetric lattice is reported. The two racemates occupy the same position in the asymmetric unit - a disordered mixed enanti-omeric structure. Hydrogen bonds of the type O-H⋯C(π) in addition to typical C-H⋯O, O-H⋯O and O-H⋯N are identified. A positional disorder is seen in the solvent mol-ecule (ethanol) as well. The phenyl-hydrazone group is nearly coplanar with the chromane ring system [dihedral angle = 15.5 (1)°], while the the 4-hy-droxy-phenyl ring is perpendicular [dihedral angle = 87.2 (1)°] to the chromane. The pyran ring has anActa crystallographica. Section E, Crystallographic communications346-348https://www.ebi.ac.uk/biostudies/studies/S-EPMC8983983biostudies-literatureCrystal structure of racemic (R/S,E)-2-(4-hy-droxy-phen-yl)-4-(2-phenyl-hydrazin-1-yl-idene)chromane-5,7-diol ethanol monosolvate.PMC8983983Yennawar HPSigmon AfalseCrystal structure of racemic (R/S,E)-2-(4-hy-droxy-phen-yl)-4-(2-phenyl-hydrazin-1-yl-idene)chromane-5,7-diol ethanol monosolvate.The crystal structure of racemic (R/S,E)-2-(4-hy-droxy-phen-yl)-4-(2-phenyl-hydrazin-1-yl-idene)chromane-5,7-diol ethanol monosolvate, C21H18N2O4·C2H6O, in a centrosymmetric lattice is reported. The two racemates occupy the same position in the asymmetric unit - a disordered mixed enanti-omeric structure. Hydrogen bonds of the type O-H⋯C(π) in addition to typical C-H⋯O, O-H⋯O and O-H⋯N are identified. A positional disorder is seen in the solvent mol-ecule (ethanol) as well. The phenyl-hydrazone group is nearly coplanar with the chromane ring system [dihedral angle = 15.5 (1)°], while the the 4-hy-droxy-phenyl ring is perpendicular [dihedral angle = 87.2 (1)°] to the chromane. The pyran ring has an2022-01-01T00:00:00Z2022 Apr2025-04-05T14:43:01.196Z2025-04-05T14:43:01.196ZS-EPMC89839833549228110.1107/S2056989022002079