title: 1,3-Diphenyl-propan-2-one (2,4-dinitro-phen-yl)hydrazone.
abstract: In the title compound, C(21)H(18)N(4)O(4), there is an intra-molecular N-H⋯O hydrogen bond between the amino H atom and an O atom of the 2-nitro group of the adjacent benzene ring. The central benzene ring forms dihedral angles of 79.98 (7) and 82.88 (7)° with the two phenyl rings. In the crystal structure, mol-ecules are linked into a three-dimensional network by weak C-H⋯N, C-H⋯O and C-H⋯π inter-actions.
authors.forename: Ligia R
authors.initials: LR
authors.lastname: Gomes
authors.forename: Carlos F R A C
authors.initials: CF
authors.lastname: Lima
authors.forename: Luís M N B F
authors.initials: LM
authors.lastname: Santos
authors.forename: Paula
authors.initials: P
authors.lastname: Brandão
authors.forename: John Nicolson
authors.initials: JN
authors.lastname: Low