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X-ray diffraction study of the title compound, C11H11NO2, (I), has shown that the molecular geometry is similar to that of 1-ethyl-4-hydroxy-2-oxo-1,2-di­hydro­quinoline-3-carboxyl­ic acid, (II) [Shishkina, Shishkin, Ukrainets, Dakkah & Sidorenko (2002). Acta Cryst. E58, o254–o256]. Observed elongations of the bonds around the N atom are caused by steric hindrance between the ethyl H atoms and the planar quinolone fragment. Exocyclic angles in the 4-position are also distorted, but, in contrast to (II), this distortion is caused by the formation of zigzag hydrogen-bonded chains along the [010] direction.
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Document Type: Research Article

Publication date: December 1, 2004

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