title: Crystal structure of 1-methyl-2-methyl-amino-3-nitro-1H-chromeno[2,3-b]pyridin-5(10aH)-one.
abstract: In the title compound, C14H13N3O4, the pyran ring adopts an envelope conformation with the methine C atom as the flap. The dihedral angle between the benzene and hydro-pyridine rings is 29.33 (3)°. The methyl-amine C atom deviates from the plane of its attached ring by 0.380 (5) Å and an intra-molecular N-H⋯O hydrogen bond closes an S(6) ring. In the crystal, weak C-H⋯O hydrogen bonds and aromatic π-π stacking inter-actions [centroid-centroid distances vary from 3.6529 (10) to 3.6872 (10) Å] link the mol-ecules, generating a three-dimensional network.
authors.affiliation: Department of Physics, Presidency College (Autonomous), Chennai 600 005, India.
authors.forename: Rajamani
authors.initials: R
authors.lastname: Raja
authors.affiliation: Organic Chemistry Division, CSIR Central Leather Research Institute, Adyar, Chennai 600 020, India.
authors.forename: Nataraj
authors.initials: N
authors.lastname: Poomathi
authors.affiliation: Organic Chemistry Division, CSIR Central Leather Research Institute, Adyar, Chennai 600 020, India.
authors.forename: Paramasivam T
authors.initials: PT
authors.lastname: Perumal
authors.affiliation: Department of Physics, Presidency College (Autonomous), Chennai 600 005, India.
authors.forename: A
authors.initials: A
authors.lastname: SubbiahPandi
keywords: chromene; crystal structure; hydrogen bonding; π–π stacking