Synthesis and crystal structure of 4-nitro-2-[(2-diethylaminoethylimino)methyl]phenol

The title Schiff base compound C13H19N3O3 synthesized by the condensation of equimolar 5-nitrosalicylaidehyde and NN-diethylethane-1,2-diai-nine consists of two independent molecules. The compound was characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system, space group Pbca with a = 13.151(3), b = 20.609(4), c = 20.991(4) angstrom, Z = 16, V 56.89(2) angstrom(3), D-c = 1.239 g/cm(3), M-r= 265.3 1, lambda(MoK alpha) = 0.71073 angstrom, mu = 0.089 mm(-1), F(000) = 2272, R = 0.0732 and wR = 0.1454. A total of 5264 unique reflections were collected, of which 2023 with I > 2 alpha(I) were observed. As expected, the molecule adopts trans configuration about the C=N double bond. The molecules in the crystal are linked through intermolecular hydrogen bonds and pi-pi interactions, forming a 3-D network.