title: 4,5,6,8,9-Pentachloropyrimido[1,2-a][1,8]naphthyridin-10-one.
abstract: The title compound, C11H2Cl5N3O, crystallizes in the monoclinic system with two molecules in the asymmetric unit. The molecules are chemically identical but have different structural parameters. In the three-dimensional packing, the molecules are arranged in dimers that are connected by slipped pi-pi stacking, and these dimers are connected to one another through several C-H...O and Cl...Cl interactions.
authors.affiliation: Departamento de Química--UFSC, 88040-900 Florianópolis, SC, Brazil. adajb@qmc.ufsc.br
authors.forename: Adailton J
authors.initials: AJ
authors.lastname: Bortoluzzi
authors.forename: Antonio C
authors.initials: AC
authors.lastname: Joussef
authors.forename: Luiz E
authors.initials: LE
authors.lastname: Silva
authors.forename: Ricardo A
authors.initials: RA
authors.lastname: Rebelo
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009287:Naphthyridines / Q000138:chemical synthesis / Q000737:chemistry*; D011743:Pyrimidines / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D009287:Naphthyridines; D011743:Pyrimidines