title: Crystal structure of (E)-9-({[4-(di-ethyl-amino)-phen-yl]imino}-meth-yl)-2,3,6,7-tetra-hydro-1H,5H-pyrido[3,2,1-ij]quinolin-8-ol.
abstract: The title compound, C23H29N3O, was synthesized from the condensation reaction of 8-hy-droxy-julolidine-9-carbaldehyde andN,N-diethyl-p-phenyl-enedi-amine. The hy-droxy group forms a intra-molecular hydrogen bond to the imine N atom and generates anS(6) ring motif. The conformation about the C=N bond isE, and the aromatic ring of the julolidine moiety is inclined to the benzene ring by 3.74 (14)°. One of the fused non-aromatic rings of the julolidine moiety adopts an envelope conformation and the other has a screw-boat conformation. In the crystal, mol-ecules are linked by C-H⋯π inter-actions involving the aromatic julolidine ring, forming slabs parallel to thebcplane. The tricyclic fragment of the julolidine ring and the azomethine C=N bond are disordered over two sets of sites with a refined occupancy ratio of 0.773 (3):0.227 (3).
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 Applied Chemistry, Aligarh Muslim University, 202002 UP, India.
authors.forename: Musheer
authors.initials: M
authors.lastname: Ahmad
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kyiv, Vladimirska Str. 64, 01601 Kiev, Ukraine.
authors.forename: Anatoly A
authors.initials: AA
authors.lastname: Kapshuk
authors.affiliation: Department of Chemistry, Taras Shevchenko National University of Kyiv, Vladimirska Str. 64, 01601 Kiev, Ukraine.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Golenya
keywords: 8-hy­droxy­julolidine-9-carboxaldehyde; C—H⋯π inter­actions; N,N-diethyl-p-phenyl­enedi­amine; Schiff base; crystal structure; hydrogen bonding; julolidine