Received 15 May 2013
The molecular structure of the pyridine derivative, C19H15N3O4·C3H7NO, shows almost planar geometry with dihedral angles of 6.9 (1) and 13.4 (1)° between the pyridine ring and the two benzene rings. This conformation is stabilized by two intramolecular N-HN(pyridine) bonds. In the crystal, strong O-HO(carboxamide) and N-HO(hydroxyphenyl) hydrogen bonds link the molecules, forming a three-dimensional structure. The dimethylformamide solvent molecules are not involved in the hydrogen bonding. The structure shows pseudosymmetry, but refinement in the space group Pbcn leads to significantly worse results and a disordered dimethylformamide molecule.
For applications of aromatic polyamides, see: Hamciuc et al., (2001); Yang et al. (1998); Diakoumakos & Mikroyannidis (1994); Ebadi & Mehdipour-Ataei (2010). For the structure of a related Co-complex, see: Ali et al. (2012).
Data collection: SMART (Bruker, 2002); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and local programs.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BT6908 ).
The authors acknowledge the Higher Education Commission of Pakistan for financial assistance and the Universität Paderborn, Germany, for carrying out XRD analysis.
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