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Enoxacin trihydrate

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Abstract:

The structure of the title compound, 1-ethyl-6-fluoro-1,4-di­hydro-4-oxo-7-(piperazin-4-ium-1-yl)-1,8-naphthyridine-3-carb­oxylate trihydrate, C15H17FN4O3·3H2O, has a zwitterion of enoxacin and three water mol­ecules in the asymmetric unit. The zwitterions form sheets lying parallel to each other and are hydrogen bonded in a head-to-tail manner. The crystal structure is stabilized by the involvement of O and H atoms from all the water mol­ecules in strong hydrogen bonds. The naphthyridine ring system is essentially planar, with the carboxyl­ate group lying out of this plane at an angle of 26.13 (6)° and the ethyl group oriented at approximately right angles to this plane. The piperazinium ring adopts a chair conformation.

Document Type: Research Article

DOI: http://dx.doi.org/10.1107/S0108270104004500

Publication date: April 1, 2004

bsc/ayc/2004/00000060/00000004/art00044
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