title: 3-(4-Meth-oxy-benzo-yl)-6-nitro-coumarin.
abstract: In the title coumarin derivative (also known as 2H-chromen-2-one or 2H-1-benzopyran-2-one), C17H11NO6, the coumarin ring system is nearly planar, with a dihedral angle of 3.35 (9)° between the pyrone and the benzene rings. The dihedral angle between the planes formed by the coumarin ring system and the benzene substituent is 54.60 (7)°, clearly showing the non-coplanarity of the whole aromatic system. The crystal studied was a non-merohedral twin; the minor component refined to approximately 0.44.
authors.affiliation: Department of Organic Chemistry, University of Santiago de Compostela, Santiago de Compostela, A Coruna, Spain.
authors.forename: Saleta
authors.initials: S
authors.lastname: Vazquez-Rodriguez
authors.forename: Eugenio
authors.initials: E
authors.lastname: Uriarte
authors.forename: Lourdes
authors.initials: L
authors.lastname: Santana