Acta Cryst. (2013). C69, 70-73 [ doi:10.1107/S0108270112047257 ]
Abstract: Diethyl 2-[(2-hydroxyanilino)methylidene]malonate, (I), and diethyl 2-[(4-hydroxyanilino)methylidene]malonate, (II), both C14H17NO5, crystallize in centrosymmetric orthorhombic and monoclinic crystal systems, respectively. Compound (I) resides on a crystallographic mirror plane and displays bifurcated intramolecular hydrogen bonding, as well as intermolecular hydrogen bonding due to the position of the hydroxy group. Compound (II) has a single intramolecular N-HO hydrogen bond. Infinite one-dimensional head-to-tail chains formed by O-HO hydrogen bonding are present in both structures. The molecular packing is mainly influenced by the intermolecular O-HO interactions. Additionally, C-HO interactions crosslinking the chains are found in (II).
Formula: Two isomers of C14H17NO5
Structure factor file (CIF format) (83.3 kbytes)
Structure factor file (CIF format) (161.7 kbytes)
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