title: 2,4,6-Triamino-1,3,5-triazine-1H-isoindole-1,3(2H)-dione (1/3).
abstract: The asymmetric unit of the title compound, C(3)H(6)N(6).3C(8)H(5)NO(2), contains a melamine and a phthalimide [1H-isoindole-1,3(2H)-dione] molecule, both residing on a mirror plane, and a second phthalimide molecule residing on a general position. The two components are linked by almost linear N-H...O and N-H...N hydrogen bonds, forming an essentially planar superstructure. These aggregates, related by a twofold screw axis, interact through weak C-H...O contacts, forming chains parallel to the b axis, while those related by translation along the c axis interact via pi-pi interactions between the pi clouds of the aromatic triazine and phthalimide rings to form a stacked structure.
authors.affiliation: Departamento de Fisica, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, CEP 35.400-000 Ouro Preto, MG, Brazil.
authors.forename: Genivaldo Júlio
authors.initials: GJ
authors.lastname: Perpétuo
authors.forename: Jan
authors.initials: J
authors.lastname: Janczak