title: Three-dimensional aggregation in 2-hydroxy-3-iodo-5-nitrobenzaldehyde involving C-H...O, iodo-nitro and aromatic pi-pi stacking interactions, and isolated dimers in disordered 2,4-diiodo-6-nitroanisole.
abstract: In 2-hydroxy-3-iodo-5-nitrobenzaldehyde, C(7)H(4)INO(4), the molecules are linked into sheets by a combination of C-H.O hydrogen bonds and two-centre iodo-nitro interactions, and these sheets are linked by aromatic pi-pi stacking interactions. Molecules of 2,4-diiodo-6-nitroanisole, C(7)H(5)I(2)NO(3), are disordered, with the nitro group and one of the I substituents each occupying common sets of sites with 0.5 occupancy. The molecules are linked into isolated centrosymmetric dimeric units by a single iodo-nitro interaction.
authors.affiliation: Departmento de Química Orgânica, Instituto de Química, Uiversidade Federal do Rio de Janeiro, RJ, Brazil.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Garden
authors.forename: Fernando R
authors.initials: FR
authors.lastname: da Cunha
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell
authors.forename: John N
authors.initials: JN
authors.lastname: Low
authors.forename: Janet M S
authors.initials: JM
authors.lastname: Skakle
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell