title: Crystal structure of (3E)-3-(2,4-di-nitro-phen-oxy-meth-yl)-4-phenyl-but-3-en-2-one.
abstract: In the title compound, C17H14N2O6, the conformation about the C=C double bond [1.345 (2) Å] is E, with the ketone moiety almost coplanar [C-C-C-C torsion angle = 9.5 (2)°] along with the phenyl ring [C-C-C-C = 5.9 (2)°]. The aromatic rings are almost perpendicular to each other [dihedral angle = 86.66 (7)°]. The 4-nitro moiety is approximately coplanar with the benzene ring to which it is attached [O-N-C-C = 4.2 (2)°], whereas the one in the ortho position is twisted [O-N-C-C = 138.28 (13)°]. The mol-ecules associate via C-H⋯O inter-actions, involving both O atoms from the 2-nitro group, to form a helical supra-molecular chain along [010]. Nitro-nitro N⋯O inter-actions [2.8461 (19) Å] connect the chains into layers that stack along [001].
authors.affiliation: BioMat-Departmento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Ignez
authors.initials: I
authors.lastname: Caracelli
authors.affiliation: BioMat-Departmento de Física, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Stella H
authors.initials: SH
authors.lastname: Maganhi
authors.affiliation: Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil.
authors.forename: Paulo J S
authors.initials: PJ
authors.lastname: Moran
authors.affiliation: Instituto de Química, Universidade Estadual de Campinas, CP 6154, 13083-970 Campinas, SP, Brazil.
authors.forename: Bruno R S
authors.initials: BR
authors.lastname: de Paula
authors.affiliation: Departmento de Qímica, Universidade Federal de São Carlos, 13565-905 São Carlos, SP, Brazil.
authors.forename: Felix N
authors.initials: FN
authors.lastname: Delling
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
keywords: N⋯O inter­actions; crystal structure; hydrogen bonding