title: Crystal structure of 9,9'-{(1E,1'E)-[1,4-phenyl-enebis(aza-nylyl-idene)]bis-(methanylyl-idene)}bis-(2,3,6,7-tetra-hydro-1H,5H-pyrido[3,2,1-ij]quinolin-8-ol).
abstract: The whole mol-ecule of the title compound, C32H34N2O2, is generated by inversion symmetry; the central benzene ring being situated about the crystallographic inversion center. The aromatic ring of the julolidine moiety is inclined to the central benzene ring by 33.70 (12)°. There are two intra-molecular O-H⋯N hydrogen bonds in the mol-ecule, generatingS(6) ring motifs. The conformation about the C=N bonds isE. The fused non-aromatic rings of the julolidine moiety adopt half-chair conformations. In the crystal, adjacent mol-ecules are linked by pairs of C-H⋯π inter-actions, forming a ladder-like structure propagating along thea-axis direction.
authors.affiliation: Department of Chemistry, College of Science, Sultan Qaboos University, PO Box 36 Al-Khod 123, Muscat, Sultanate of , Oman.
authors.forename: Md Serajul Haque
authors.initials: MS
authors.lastname: Faizi
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP 208 016, India.
authors.forename: Akram
authors.initials: A
authors.lastname: Ali
authors.affiliation: Department of General and Inorganic Chemistry, National Technical University of Ukraine, Kyiv Polytechnic Institute, 37 Prospect Peremogy, 03056 Kiev, Ukraine.
authors.forename: Vadim A
authors.initials: VA
authors.lastname: Potaskalov
keywords: 8-hy­droxy­julolidine-9-carboxaldehyde; C—H⋯π inter­actions; Schiff base; crystal structure; hydrogen bonding; julolidine; p-phenyl­enedi­amine