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Four nitrobenzaldehyde isonicotinoylhydrazones at 120 K: four different supramolecular structures in two and three
Solange M S V Wardell1, Marcus V N de Souza, James L Wardell
1Fundação Oswaldo Cruz, Far Manguinhos, Rua Sizenando Nabuco, 100 Manguinhos, 21041-250 Rio de Janeiro, RJ, Brazil.
Abstract:
The molecules of 2-nitrobenzaldehyde isonicotinoylhydrazone, C13H10N4O3, (I), are linked into a three-dimensional framework by a combination of one N-H...N and three C-H...O hydrogen bonds. In the isomeric compound 3-nitrobenzaldehyde isonicotinoylhydrazone, (II), the molecules are linked into complex sheets by a combination of three hydrogen bonds, one each of the N-H...N, C-H...N and C-H...O types. The molecules of the third isomer, namely 4-nitrobenzaldehyde isonicotinoylhydrazone, (III), are linked into bilayers by a combination of one N-H...N, one C-H...N and two C-H...O hydrogen bonds. 2,4-Dinitrobenzaldehyde isonicotinoylhydrazone, (IV), crystallizes as a stoichiometric monohydrate, C13H9N5O5.H2O, and the molecular components are linked into a three-dimensional framework by a combination of O-H...O, O-H...N, N-H...O and three independent C-H...O hydrogen bonds.
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