ABSTRACT
The title compound, C11H9NO3, contains an isoxazole and a hy-droxy-benzyl-idene ring, which are inclined to each another by 3.18â (8)°. There is an intra-molecular C-Hâ¯O contact forming an S(7) ring. In the crystal, mol-ecules stack head-to-tail in columns along the b-axis direction, linked by offset π-π inter-actions [inter-centroid distances of 3.676â (1) and 3.723â (1)â Å]. The columns are linked by O-Hâ¯O and O-Hâ¯N hydrogen bonds, forming layers parallel to the ab plane. The layers are linked by C-Hâ¯O hydrogen bonds, forming a supra-molecular three-dimensional framework. An analysis of the Hirshfeld surfaces points to the importance of the O-Hâ¯O and O-Hâ¯N hydrogen bonding in the packing mechanism of the crystal structure.
ABSTRACT
The title compound, C20H19NO2, is of inter-est as a precursor to biologically active substituted quinolines and related compounds. This compound crystallizes with two independent mol-ecules (A and B) in the asymmetric unit. The dihedral angles between mean planes of the methyl-phenyl ring and the naphthalene ring system are 78.32â (6) and 84.70â (6)° in mol-ecules A and B, respectively. In the crystal, the anti-ferroelectric packing of mol-ecules A and B is of an ABBAABB type along the b-axis direction. The crystal structure features N-Hâ¯O, O-Hâ¯O and weak C-Hâ¯O hydrogen bonds, which link the mol-ecules into infinite chains propagating along the b-axis direction.