title: Isomeric N-(iodophenyl)nitrobenzamides form different three-dimensional framework structures.
abstract: The isomeric N-(iodophenyl)nitrobenzamides, C(13)H(9)IN(2)O(3), all form different three-dimensional framework structures. Molecules of N-(2-iodophenyl)-3-nitrobenzamide (II) are linked by a combination of N-H...O and C-H...O hydrogen bonds and a two-centre iodo...carbonyl interaction. The supramolecular structure of N-(2-iodophenyl)-4-nitrobenzamide (III) is built from one N-H...O and two C-H...O hydrogen bonds, but short I...O contacts are absent from the structure. In N-(3-iodophenyl)-2-nitrobenzamide (IV), which crystallizes with Z' = 2 in space group P2(1), the structure contains two N-H...O hydrogen bonds, four C-H...O hydrogen bonds, two two-centre iodo...nitro interactions and an aromatic pi...pi stacking interaction. The structure of N-(3-iodophenyl)-3-nitrobenzamide (V) contains one N-H...O hydrogen bond and three C-H...O hydrogen bonds, together with a two-centre iodo...nitro interaction and an aromatic pi...pi stacking interaction, while in N-(3-iodophenyl)-4-nitrobenzamide (VI), the combination of one N-H...O hydrogen bond and two C-H...O hydrogen bonds is augmented not only by a two-centre iodo...nitro interaction and an aromatic pi...pi stacking interaction, but also by a dipolar carbonyl...carbonyl interaction. In the supramolecular structure of N-(4-iodophenyl)-4-nitrobenzamide (IX), which crystallizes with Z' = 2 in space group P\overline 1, there are two N-H...O hydrogen bonds, four C-H...O hydrogen bonds and two three-centre iodo...nitro interactions.
authors.affiliation: Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, CP 68563, 21945-970 Rio de Janeiro, RJ, Brazil.
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell