title: Ethyl 4-oxo-8-trifluoro-methyl-1,4-dihydro-quinoline-3-carboxyl-ate.
abstract: The asymmetric unit of the title compound, C13H10F3NO3, contains two independent mol-ecules with similar conformations. In the crystal, N-H⋯O hydrogen bonds link alternating independent mol-ecules into chains in [-110]. In the chain, the quinoline planes of the independent mol-ecules are almost perpendicular to each other, forming a dihedral angle of 89.8 (1)°. π-π inter-actions between the aromatic rings of quinoline bicycles related by inversion centres [for two independent centrosymmetric dimers, the shortest centroid-centroid distances are 3.495 (1) and 3.603 (1) Å] link the hydrogen-bonded chains into layers parallel to (110). Weak C-H⋯F and C-H⋯O inter-actions further consolidate the crystal packing.
authors.affiliation: National Institute of Technology-Karnataka, Department of Chemistry, Organic Chemistry Laboratory, Surathkal, Mangalore 575 025, India.
authors.forename: B
authors.initials: B
authors.lastname: Garudachari
authors.forename: Arun M
authors.initials: AM
authors.lastname: Islor
authors.forename: M N
authors.initials: MN
authors.lastname: Satyanarayan
authors.forename: Thomas
authors.initials: T
authors.lastname: Gerber
authors.forename: Eric
authors.initials: E
authors.lastname: Hosten
authors.forename: Richard
authors.initials: R
authors.lastname: Betz